Temperature
Cold by day, cold at night.
Blue Lagoon is usually most comfortable from June to August. Typical daytime highs range from 38–57°F across the year. Rain is frequent in many months.

Cold by day, cold at night.
Some precipitation is expected this month.
Sunshine is limited, with cloud often dominating.
Humidity is rarely noticeable in the cool air.
In November, afternoons feel about 29° and nights feel near 27°.
Mostly cloudy skies this month.
Breezy November days can feel brisker in open spots.
November stays around 38°F through the day and night.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 38 | 32 | 4.7 | 18 | 1.7 | 79 |
| Feb | 38 | 31 | 4.7 | 17 | 4.1 | 78 |
| Mar | 40 | 32 | 4.4 | 17 | 6.9 | 77 |
| Apr | 44 | 36 | 3.9 | 16 | 9.6 | 76 |
| May | 49 | 41 | 3.5 | 16 | 12.1 | 76 |
| Jun | 54 | 46 | 2.9 | 14 | 12.4 | 79 |
| Jul | 57 | 49 | 3.1 | 14 | 11.6 | 82 |
| Aug | 56 | 49 | 3.8 | 15 | 9.7 | 82 |
| Sep | 52 | 45 | 5.3 | 18 | 7.2 | 82 |
| Oct | 45 | 39 | 4.7 | 16 | 5.3 | 81 |
| Nov | 41 | 35 | 4.3 | 16 | 2.6 | 79 |
| Dec | 39 | 32 | 4.7 | 17 | 0.9 | 79 |
Similar climates
Want a side-by-side climate view? Compare Blue Lagoon with Amsterdam.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 27, 2026
Data & methodology