SeasonMapCosta Rica in September
September is one of Costa Rica's weaker months (rank 10 of 12): its 10 destinations average 59/100, led by Puerto Viejo at 67 — 34°C and 29 rainy days — while Monteverde is cooler at 27°C and scores 59.
#10 of 12 months for Costa Rica · 10 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Costa Rica in September
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | Puerto Viejo | Beach | 34°C | 286 mm · 29 days | 67 tier C | — |
| 2 | Santa Teresa | Beach | 34°C | 295 mm · 29 days | 63 tier C | — |
| 3 | Monteverde | Trekking hub | 27°C | 312 mm · 29 days | 59 tier D | — |
| 4 | San José | City | 32°C | 355 mm · 29 days | 58 tier D | — |
| 5 | Tamarindo | Beach | 36°C | 321 mm · 29 days | 58 tier D | — |
| 6 | La Fortuna | Trekking hub | 33°C | 270 mm · 29 days | 57 tier D | — |
| 7 | Nosara | Beach | 37°C | 425 mm · 30 days | 57 tier D | — |
| 8 | Jacó | Beach | 34°C | 720 mm · 30 days | 56 tier D | — |
| 9 | Manuel Antonio | Beach | 33°C | 823 mm · 30 days | 56 tier D | — |
| 10 | Tortuguero | National park | 36°C | 279 mm · 29 days | 56 tier D | — |
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means September is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Costa Rica in September
- Arribada at Ostional · Nosara · 1 Jul – 31 Dec (usually)
- Humpback whales · Jacó · 15 Jul – 15 Nov (usually)
- Olive ridley nesting · Jacó · 15 Aug – 15 Dec (usually)
- Green turtle nesting · Tortuguero · 1 Jul – 31 Oct
- Independence Day · San José · 14–15 Sep
- Humpbacks off the headland · Manuel Antonio · 15 Jul – 31 Oct (usually)