Surf forecastStatisticsHistorical report

Florence seasonal overview

Best Surf Season (October - March)

The North Pacific flexes its muscle during these months, delivering a relentless onslaught of powerful, long-period swell generated by deep low-pressure systems rolling off the Aleutians. Average wave heights consistently surpass 2.5m, often pushing into the 3m+ range, with periods frequently topping 12 seconds. This is when Florence’s west-facing sandbars really light up, offering a mix of pumping beach-break barrels and rippable faces. The wildcard? Wind. While ideal offshore conditions (light easterlies) only clock in around 40-44% of the time during this window, the payoff is huge when a cold front clears the coast and sets up glassy mornings with XL NW groundswell.

Fair Surf Season (April - June)

As winter storms slowly wind down, the Pacific settles into a more transitional pattern. Swell heights drop to a still-solid 1.8-2.3m average, and periods shrink to the 10-11 second range. The dominant W to WNW swell train remains consistent, but the energy is less charged. Offshore wind percentages fall to 20-27%, meaning you'll have to pick your windows carefully. This is the season of fun-sized mornings and afternoon onshore chop – a great time for groveling on a groveler or logging when the tide drops.

Low Surf Season (July - September)

Summertime in Florence is a test of patience. The average wave height bottoms out around 1.5m, periods dip into the average 9-10 second range, and the swell direction shifts more northerly (NNW to NW). While the consistency is still there, the power and size are diminished. The wind picture is tricky: offshore flow is scarce (20-36%), and strong thermal gradients drive morning N winds that often turn NW and ruin the shape. Still, long-period south swells can sneak in, and when a summer tropical system spins up, those epic windows can emerge – but they're the exception, not the rule.

Loading chart...

Conditions at Florence in September

September: The Transition Begins

September signals the shift back to winter. Average swell height climbs to 1.7m and period to 10.7s – still moderate but with more punchy days. The swell distribution shows a strong WNW (31.2%) and NW (25.9%) pattern, with W (17.1%) also contributing. Wave heights are concentrated in the 1-2m range, with occasional overhead sets. Offshore wind percentage jumps to 36% as the N wind decreases (34.7%) and NE to ENE flow becomes more common. This is a promising month: the ocean starts waking up, and with a good long-period NW swell and light easterly winds, Florence can deliver solid surf before winter fully kicks in.

Average Spot conditions at Florence in September

Swell history for September

0 - 0.5
0.5 - 1
1 - 1.5
1.5 - 2.0
2.0 - 2.5
> 2.5 m

Wind history for September

0 - 10
10 - 20
20 - 30
30 - 40
40 - 50
> 50 km/h

Swell quality

Analyze the groundswell consistency at Florence during September. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Florence for your next trip in September.

Ground swell

Ground swell by size

Wind conditions

Evaluate the wind and swell alignment at Florence for September. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Florence.

Swell with good wind

Swell with good wind by size