Praia da Cal - surf spot statistics

{ "spot_name": "Praia da Cal", "seasonal_overview": "

Best Surf Season (April - August)

The South Atlantic winter unleashes its full potential from April through August. A combination of consistent swell energy and favorable offshore wind patterns creates the most reliable surf at Praia da Cal. Average wave heights sit in the 1.6-1.7m range with periods averaging 9-10 seconds, delivering punchy, rippable waves. The dominant high-pressure systems over the continent funnel offshore breezes from the NW to NNW quadrants, with ideal wind percentages peaking above 50% in May and June. This window offers the best chance at clean, powerful surf – often with long-period groundswell wrapping into the ESE-facing beach.

Fair Surf Season (March & September)

These transitional months bridge the summer and winter patterns. March still sees a respectable 39% offshore wind and solid 1.5m swell at 8.8s, but the trade winds begin to strengthen, mixing in more onshore days. September brings the largest average swell height of the year at 1.8m, yet the wind becomes less cooperative – only 31% offshore. Expect fun, sometimes oversized waves but with a higher likelihood of bumpy conditions due to increased ENE/NE onshore flow. These months reward those who pick their windows carefully.

Low Surf Season (October - February)

The South Atlantic summer settles in from October through February, bringing smaller, weaker swell and persistent onshore trade winds. Average wave heights drop to 1.4-1.5m with shorter periods around 8-8.5s, often producing choppy, low-energy surf. The wind ideal percentage falls to 26-37% as strong ENE to NE winds dominate the region, ruining wave quality for extended stretches. While occasional pulses of S-SSE swell can light up the lineup, the overall pattern is dominated by micro to small, onshore-slanted conditions. This is the time for patience – or a dawn patrol mission when the rare offshore breeze aligns with a fresh south swell.

", "monthly_stats": { "january": "

January: Summer Lull and Trade Wind Grip

January is deep in the Brazilian summer, and the surf reflects the season's relaxed energy. The average swell height sits at a modest 1.4m with a period of 8.2s, churning mostly windswell and short-period groundswell. Swell directions are heavily biased toward the eastern quadrant – ENE (20.6%), E (24.8%), and ESE (20.9%) – with some SE (14.3%) and SSE (10.1%) contributions. While E, ESE, and SE are optimal for the beach's ESE orientation, the prevalence of ENE (just north of optimal) means much of the swell arrives slightly off-angle and less organized. The situation is further compromised by wind: offshore breezes from the west quadrants (W, WNW, NW, NNW) occur only a combined ~8.5% of the time, yet the overall favorable wind window reaches 32%, likely due to occasional light/variable conditions. The dominant trade winds blow from NNE (12.8%), NE (19.0%), and ENE (15.2%) – all onshore and often gusty, creating bumpy, choppy surfaces. Most days deliver small, groveling waves (<1m) with a few fun-sized 1-1.5m sets when a southerly push aligns. It's a month for small-wave boards and low expectations, though a keen eye on synoptic charts can still catch a clean morning before the seabreeze fires up.

", "february": "

February: Slightly Better but Still Summer Dominated

February brings a subtle improvement over January as the average swell height holds at 1.4m but the period nudges up to 8.3s, hinting at a touch more organization. Swell remains locked in the east with ENE (17.5%), E (21.5%), and ESE (22.0%) leading the charge, while SE (16.7%) and SSE (11.7%) provide occasional variety. The increased ESE component is a good sign – it's a more direct angle for the beach, producing better shaped waves when conditions align. The wind ideal percentage climbs to 37%, the best of the summer months, as westerly quadrant winds (W, WNW, NW, NNW) account for a combined 11.8% and lighter northerly flows offer some reprieve. Still, the NE trade winds (16.3%) and NNE (13.1%) remain dominant, often ruining the afternoon. The occasional cold front pushing into the South Atlantic can deliver a pulse of longer-period S or SSE swell (7.2% and 5.5% combined) with a favorable wind shift to NW or W, creating a brief but memorable session. Average wave heights in the 1-1.5m range are common, with some solid 1.5-2m sets on the better days. Patience is key – the good windows are short but rewarding.

", "march": "

March: Transitioning into the Sweet Spot

March marks the beginning of the transition toward autumn, and the surf responds with a noticeable uptick in quality. Average swell height reaches 1.5m and period extends to 8.8s, offering more punch and rideable lines. Swell direction spreads across E (20.7%), ESE (22.3%), SE (18.5%), and SSE (15.3%), with ENE dropping to 10.0% – a trend favoring the optimal window. The SE and SSE contributions are particularly welcome, as these angles wrap nicely into the beach. Wind ideal percentage rises to 39%, supported by stronger westerly flows (W, WNW, NW, NNW total ~12.3%), while NE trade winds (15.0%) and NNE (13.1%) still dominate but with less intensity than summer. The onset of autumn brings more frequent frontal passages, which can deliver a day or two of clean, moderate swell with offshore winds from the NW. Wave heights in the 1-1.5m range are the norm, with occasional 1.5-2m sets that become more common toward the end of the month. March is a great month to start watching the South Atlantic storm track – the seeds of the upcoming winter pattern are being sown.

", "april": "

April: Winter Swell Arrives, Winds Improve

April signals the real beginning of surf season at Praia da Cal. The average swell height climbs to 1.6m with a solid period of 9.1s, indicating increasingly powerful groundswell. Swell directions broaden significantly: ENE (11.2%), E (17.1%), ESE (16.5%), SE (16.5%), SSE (15.9%), and a notable S component (12.7%). The S swells (optimal SSO in German) are especially significant, as they wrap in with long-period energy and often produce the best waves of the year. The wind ideal percentage jumps to 44% as offshore flows from the NW (4.2%), NNW (5.5%), W (3.3%), and WNW (3.2%) strengthen, while onshore ENE (8.5%) and NE (14.7%) weaken. The South Atlantic high-pressure system begins to migrate south, opening a corridor for cold fronts to push swell toward the coast with favorable wind shifts. The average wave height range of 1-1.5m is common, but 1.5-2m and even 2-2.5m sets become more frequent (the S quadrant alone contributes 10.1% in these larger ranges). April delivers the first consistent taste of winter-quality surf – a month to book your trip.

", "may": "

May: Prime Time – Consistent Power and Clean Winds

May is the crown jewel of the surf year at Praia da Cal. Average swell height holds at 1.7m with a period soaring to 9.8s, delivering long-period, groundswell-driven waves. The swell direction distribution is heavily weighted toward the southern half: S (18.1%), SSE (16.7%), SE (13.4%), and ESE (13.7%), with E (11.5%) and ENE (10.5%) playing supporting roles. The dominance of S and SSE swells – both within the optimal window – means the beach receives powerful, organized lines that wrap in cleanly. The wind ideal percentage peaks at 50%, the highest of the year, thanks to consistent offshore flows from the NW (5.3%), NNW (6.8%), WNW (4.7%), and W (4.1%). The trade wind influence is at its annual minimum, with onshore NE (11.2%) and ENE (5.5%) greatly reduced. This combination of reliable long-period swell and clean offshore wind creates firing conditions. Wave heights regularly fall in the 1.5-2m range (S alone contributes 7.8% in that band) with plenty of 2-2.5m sets. May is when the South Atlantic storm track is most active, and every frontal passage brings a new pulse of swell. This is the month to score the best surf of the year.

", "june": "

June: Peak Power with Exemplary Offshore Winds

June rivals May as the peak of the winter season, with average swell height at 1.6m and period of 9.7s, maintaining the powerful, long-period character. Swell directions show a similar pattern to May: S (18.9%), SSE (14.5%), SE (11.9%), ESE (11.8%), E (12.2%), and ENE (13.8%). The S component remains strong, indicating consistent deepwater swell from the southern storms. The wind ideal percentage reaches 54%, the highest of the year, as offshore winds from the western quadrants dominate: NNW (7.1%), NW (6.7%), WNW (4.5%), and W (5.0%). Onshore trades are at their weakest – NE (10.9%) and ENE (4.3%) – meaning clean conditions prevail for extended periods. Wave heights in the 1.5-2m and 2-2.5m ranges are common, with the S direction contributing 9.1% and 4.1% respectively in those bands. The consistency is remarkable; the South Atlantic low-pressure systems line up like clockwork, providing a steady stream of high-quality surf. June is a month for confident forecasts and unforgettable sessions at Praia da Cal.

", "july": "

July: Still Firing, Slight Trade Wind Increase

July continues the winter rhythm with average swell height at 1.6m and period of 9.4s, still in the "powerful, long period" category. Swell direction remains broad: ENE (16.7%), E (14.1%), ESE (11.0%), SE (11.4%), SSE (13.5%), and S (15.8%). Note an uptick in ENE and a slight drop in S compared to June, but the overall mix still favors optimal angles. The wind ideal percentage remains high at 51%, though onshore NE (12.6%) and NNE (11.5%) begin to increase slightly, signaling the eventual return of trades. Offshore flows from NW (5.6%), NNW (7.4%), WNW (3.9%), and W (3.5%) remain healthy. Wave height distribution shows a solid core of 1-2m surf, with S and SSE providing the bulk of the 1.5-2m and 2-2.5m sets. July is still prime time, but the early signs of a shift are evident – the trade winds start to creep back. Still, the overall quality is excellent, and savvy surfers can score clean waves by dodging the occasional onshore day. This month rewards those who watch the synoptic charts for post-frontal offshore windows.

", "august": "

August: Late Winter Mix – Big Swell, More Wind

August sees the average swell height nudge up to 1.7m with a period of 9.2s – still solid winter groundswell. Swell direction remains diverse: ENE (18.7%), E (14.8%), ESE (12.2%), SE (12.8%), SSE (12.4%), and S (13.3%). The ENE contribution is the highest of the winter months, which means some swell arrives from a less ideal angle. The wind ideal percentage drops to 45% as the trade winds strengthen: NE (15.4%) and NNE (13.2%) are more prominent, while offshore winds from NW (4.5%), NNW (5.2%), WNW (2.6%), and W (2.4%) are still present but less frequent. The peak wave heights are impressive – the 2-2.5m range sees significant contributions from ENE (3.0%), S (3.8%), and others. August offers the biggest average swell of the year, but the onshore influence means not every day is clean. However, when a cold front passes and the wind shifts to the northwest, the resulting surf can be epic – powerful, long-period waves with offshore conditions. This is a month for experienced forecasters who can pick the sweet spots in an otherwise windier pattern.

", "september": "

September: Big Swell, Tricky Winds

September brings the largest average swell height of the year at 1.8m, but the period holds at 9.1s, indicating a mix of longer-period groundswell and some shorter-period windswell. Swell directions show a strong ENE component (18.9%), with E (15.7%), ESE (13.9%), SE (13.6%), SSE (12.0%), and S (10.4%). The ENE swell is suboptimal for this ESE-facing beach, but the E and ESE contributions are still significant. The wind ideal percentage plummets to 31%, the lowest since February, as the trade winds rebuild: NE (20.3%) and ENE (10.6%) dominate, along with increased SSW (10.3%) and SW (7.2%) winds that are cross-shore or onshore. Offshore winds from the west are rare (NW 1.6%, NNW 2.9%, WNW 1.5%, W 1.8%). This makes clean conditions hard to come by, despite the abundant swell. When the wind does align from the west, often behind a cold front, the waves can be massive and powerful – 2-2.5m sets are frequent (ENE 4.7%, E 3.4%, SE 2.9%, S 3.8%). However, those windows are brief. September is a month of contrast – potential for pumping surf, but you'll need patience and flexibility to find the cleanest moments.

", "october": "

October: Spring Onslaught – Onshore Winds Dominate

October marks the transition to spring, with the South Atlantic high pressure strengthening and pumping robust trade winds. Average swell height remains solid at 1.7m, but the period drops to 8.6s, indicating shorter-period, more wind-affected swell. Swell direction is heavily east-dominated: ENE (22.2%), E (20.5%), ESE (14.1%), SE (12.6%), SSE (11.7%), and S (8.9%). The ENE and E components are strong, but these directions are not as ideal as the more southerly angles. The wind ideal percentage falls to 26% as NE trades (23.4%) and ENE (14.1%) rage, creating consistent onshore conditions. Offshore winds from the west are at a minimum (NW 1.5%, NNW 2.3%, WNW 1.2%, W 1.2%). The result is a lot of bumpy, choppy surf with short-period swell. Wave heights in the 1-1.5m range are common, but the quality is often poor due to wind texture. Occasional pulses of SSE or S swell can break through the trade wind regime, offering a few days of better waves, but overall October is a challenging month. It's a time to keep expectations low and cherish any clean morning before the seabreeze ruins it.

", "november": "

November: Spring Swell with Persistent Onshore Flow

November mirrors October closely. Average swell height holds at 1.6m with a period of 8.5s, again dominated by short-period, wind-driven seas. Swell direction continues the trend: ENE (21.8%), E (20.4%), ESE (17.1%), SE (12.5%), SSE (12.9%), and S (7.8%). The optimal southerly angles are less present. The wind ideal percentage remains low at 26%, with NE trades (22.6%) and ENE (14.7%) prevailing. Offshore winds from the west are sparse (NW 1.4%, NNW 2.3%, WNW 1.1%, W 1.6%). The onshore flow is relentless, creating mostly messy conditions. Wave heights in the 1-1.5m and 1.5-2m ranges are present, but the quality is often subpar. The bright side is that the first hints of winter might appear with an early cold front bringing a touch of S swell and a brief westerly wind shift. But overall, November is a month for persistence and small-wave gear, waiting for that rare clean session.

", "december": "

December: Summer Returns – Small and Onshore

December signals the full onset of summer, with average swell height dropping to 1.5m and period at 8.2s – a return to low-energy, short-period swell. Swell directions are heavily concentrated in the east: ENE (22.1%), E (22.8%), ESE (17.0%), SE (13.6%), SSE (11.9%), and S (8.2%). The direct east angles are not optimal, and the lack of S or SSE contributions limits the potential for quality. The wind ideal percentage is only 28%, as NE (19.4%) and ENE (16.0%) trades dominate, with strong NNE (12.0%) as well. Offshore winds from the west are minimal (NW 2.1%, NNW 2.8%, WNW 1.4%, W 1.2%). The summer pattern of strong seabreezes and persistent onshore flow makes for predominantly small, choppy conditions. Wave heights in the 0.5-1m and 1-1.5m ranges are common, with the occasional 1.5-2m set from a tropical or frontal low. December is a time for groveling, fun-sized waves – not the place for a serious swell chase. But for those who don't mind the summer vibe, there are still fun waves to be had, especially early in the morning before the trade winds kick in.

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