Apollonas seasonal overview
Best Surf Season (October - March)
The winter months see the Aegean Sea come to life as frequent low-pressure systems track across the Mediterranean, generating a steady diet of north and northwest swell. With average wave heights ranging from 1.0 to 1.3 meters and periods hovering around 5 seconds, the surf is often punchy and rideable but rarely powerful. The crucial factor is wind: these months offer the highest probability of offshore conditions (from the south to southwest quadrant), though the percentage remains low—only 3 to 7% of the time. Still, when a high pressure settles south of Greece, light south winds align with a solid N-NE groundswell, Apollonas can produce fun, rippable waves in the shoulder-high range. The best chance for a session lies in watching the synoptic charts for a brief window of south wind cleansing the northerly swell.
Fair Surf Season (April - May & September)
The transition months bring a shift in the weather patterns. The thermal low over Anatolia begins to strengthen, initiating the summer north wind regime, but occasional frontal passages still deliver swell. Average heights drop to 0.7-0.9 meters with periods around 4.5-4.8 seconds, yielding mostly small, groveling waves. Offshore wind percentages hover around 5-7% in spring and drop to 2% in September. While quality is elusive, these months offer the best chance for clean, smaller waves on a longboard or funboard when the wind cooperates.
Low Surf Season (June - August)
The summer months are the most challenging for surfers at Apollonas. The persistent Etesian winds blow from the north, directly onshore, ruining what little swell is present. The swell itself is dominated by short-period, local wind waves from the NNW with an average height around 1.0m in July and August, but these are accompanied by strong onshore winds over 30kph up to 30-50% of the time. The result is choppy, messy conditions with barely any rideable waves. Offshore wind is virtually non-existent (2% of the time). This is the time to travel elsewhere or take a break from surfing this spot.
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Conditions at Apollonas in September
September: Transition Begins, Still Wind-Dominated
September's average swell drops slightly to 0.9m with a period of 4.8s, as the summer pattern lingers. NNW swell still accounts for 58.9% of the total, but there are hints of change: N swell (11.2%) and a slight uptick in SW (5.8%) and WSW (8.4%) groundswell. Wind remains a challenge: north (34.1%) and NNW (31.9%) combine for 66% of observations, while ideal wind is only 2%. As the month progresses, occasional cold fronts can flip winds to the south, offering brief, clean windows. The best chance for surf comes late in the month when the first autumn lows generate longer-period swell.
Average Spot conditions at Apollonas in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Apollonas 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 Apollonas for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Apollonas 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 Apollonas.
