Siargao (Cloud 9) weather in September
September in Siargao: sweltering, rainy, with clean air — fine if you can take sticky heat.
Updated September 2026 · climate normals from ERA5 reanalysis
#1 of 12 months in Siargao · #508 of 1413 destinations to visit in September · comfort 85/100 (tier A)
- Days
- 29°C
- Nights
- 26°C
- Wet days
- 17
- Sun
- 9.7 h
- Humidity
- 80%
- Daylight
- 12 h
Traveller notes on Siargao in September
September and October are Siargao's peak surf months — the waves are good, competitions run in September, and Cloud 9 works on Pacific swell. The forum's typhoon answer is geographic: Siargao sits in the southern Philippines, near the equator and outside the main typhoon belt, so when the Visayas are being hit Mindanao is often bright and sunny — though the island is close enough to Leyte that a storm passing nearby still matters. On rain, regulars note September is drier here than January, while the record still shows about seventeen wet days. Days near 29°C, nights 27, sea at 30.
Other months in Siargao
Forum posters describe March as the start of Siargao's summer peak season and a genuine improvement on the wetter December-February stretch, with clearer, more reliably sunny conditions becoming more common from March into June - though posters are direct that being in the tropics means rain or even a passing storm remains a real possibility, with one visitor specifically recalling a typhoon passing through during a March stay. The destination's own climate data shows March still averaging well over 20 rainy days, easing only modestly from the January-February peak and continuing to improve into the true driest stretch around April-September. Posters also flag March as the end of the school year, meaning more crowds at Siargao's popular beaches and surf spots than the quieter months surrounding it. Posters generally rate March as improving but still genuinely rain-prone for Siargao, with the driest conditions still a couple of months off.
Add your own note from Siargao's card on the map.
Siargao climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Siargao in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsCloud 9 surf season, Siargao International Surfing Cup, Term 1 wellness break in Philippines(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Siargao's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherSiargao's best weather comes in April, June and September — separate windows, not one continuous season.
September includes Siargao International Surfing Cup.
Best weatherFair weatherToughest weather
What's on in Siargao in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Cloud 9 surf season
1 Aug – 30 Nov · usuallyCrowdedThe swell the island is named for on the surfing maps, breaking over shallow reef in front of the boardwalk. It is a proper wave, not a learners' one, and the line-up shows it. Source ↗
- Festival
Siargao International Surfing Cup
1 Sep – 15 Oct · usuallySporting eventCrowdedBook earlyThe competition that has run at Cloud 9 since the mid-nineties, timed to the best of the swell. Accommodation in General Luna goes months ahead of the announced dates. Source ↗
- Hazard
Typhoon season
1 Sep – 31 DecClosuresSiargao sits where systems make landfall and it was flattened in December 2021. Flights and the Surigao ferry stop for days at a time when one is tracking in. Source ↗
Nearby, and something's on
Within 300 km of Siargao — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Siargao?
Siargao in September — FAQ
- Is September a good time to visit Siargao?
- September in Siargao: sweltering, rainy, with clean air — fine if you can take sticky heat. It ranks #1 of 12 months for Siargao on SeasonMap's comfort score (85/100).
- What is the weather like in Siargao in September?
- In September, Siargao averages a daily high of 28.7°C and a low of 26.4°C, with about 103.6 mm of rain over roughly 17.3 rainy days.
- What is the air quality in Siargao in September?
- Siargao has a mean US Air Quality Index of about 30 in September.
Within 300 km: Cebu City's The Ber months around 1 Sep – 25 Dec, and Bohol's Habagat rains around 1 Jun – 31 Oct.