Temperature
Hot by day, warm at night.
Hot afternoons and plenty of sun.

Hot by day, warm at night.
Mostly dry. About 2 wet days, the lowest monthly average.
Plenty of sun this month.
Hot days with humid stretches.
In August, afternoons feel about 92° and nights feel near 80°.
Partly cloudy skies this month.
Calm winds are typical in August.
August late afternoons are around 89°F, easing to about 83°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 88 | 76 | 11.8 | 29 | 8.7 | 84 |
| Feb | 88 | 76 | 11.0 | 27 | 8.9 | 85 |
| Mar | 88 | 76 | 10.0 | 28 | 9.3 | 84 |
| Apr | 89 | 76 | 5.6 | 21 | 9.7 | 81 |
| May | 91 | 76 | 1.9 | 10 | 10.5 | 75 |
| Jun | 91 | 75 | 0.9 | 6 | 10.6 | 71 |
| Jul | 91 | 74 | 0.5 | 3 | 10.8 | 67 |
| Aug | 91 | 73 | 0.1 | 2 | 11.0 | 64 |
| Sep | 93 | 75 | 0.4 | 3 | 11.2 | 63 |
| Oct | 94 | 77 | 1.5 | 8 | 11.4 | 65 |
| Nov | 92 | 78 | 4.6 | 18 | 10.4 | 72 |
| Dec | 89 | 77 | 10.0 | 27 | 8.9 | 82 |
Similar climates
Want a side-by-side climate view? Compare Surabaya with Singapore.
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 26, 2026
Data & methodology