| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 6.4° | 2.7° | 65.3mm | 18.1 | 26 |
| February | 7.3° | 3.1° | 51.5mm | 15 | 29 |
| March | 9.7° | 4.5° | 47.2mm | 13.5 | 40 |
| April | 13.3° | 6.9° | 33.2mm | 10.8 | 57 |
| May | 16.9° | 10.3° | 49.7mm | 12.3 | 65 |
| June | 20° | 13.3° | 52.7mm | 11.3 | 77 |
| July | 21.8° | 15.4° | 70.8mm | 12.7 | 75 |
| August | 22.2° | 15.8° | 81.3mm | 12.7 | 75 |
| September | 19.4° | 13.7° | 62.5mm | 12 | 74 |
| October | 15.2° | 10.5° | 72.4mm | 15.1 | 55 |
| November | 10.6° | 6.7° | 79.8mm | 17.5 | 40 |
| December | 7.3° | 3.7° | 77.8mm | 18.1 | 29 |
January in Ostend averages a daily high of 6.4°C with nights around 2.7°C. Expect roughly 18.1 wet days totalling 65.3mm. A hard month to visit for comfort alone.
February in Ostend averages a daily high of 7.3°C with nights around 3.1°C. Expect roughly 15 wet days totalling 51.5mm. A hard month to visit for comfort alone.
March in Ostend averages a daily high of 9.7°C with nights around 4.5°C. Expect roughly 13.5 wet days totalling 47.2mm. Demanding conditions — pack for it and plan indoor options.
April in Ostend averages a daily high of 13.3°C with nights around 6.9°C. Expect roughly 10.8 wet days totalling 33.2mm. Generally workable, with some weather to plan around.
May in Ostend averages a daily high of 16.9°C with nights around 10.3°C. Expect roughly 12.3 wet days totalling 49.7mm. Generally workable, with some weather to plan around.
June in Ostend averages a daily high of 20°C with nights around 13.3°C. Expect roughly 11.3 wet days totalling 52.7mm. Comfortable conditions for being outdoors all day.
July in Ostend averages a daily high of 21.8°C with nights around 15.4°C. Expect roughly 12.7 wet days totalling 70.8mm. Comfortable conditions for being outdoors all day.
August in Ostend averages a daily high of 22.2°C with nights around 15.8°C. Expect roughly 12.7 wet days totalling 81.3mm. Comfortable conditions for being outdoors all day.
September in Ostend averages a daily high of 19.4°C with nights around 13.7°C. Expect roughly 12 wet days totalling 62.5mm. Generally workable, with some weather to plan around.
October in Ostend averages a daily high of 15.2°C with nights around 10.5°C. Expect roughly 15.1 wet days totalling 72.4mm. Generally workable, with some weather to plan around.
November in Ostend averages a daily high of 10.6°C with nights around 6.7°C. Expect roughly 17.5 wet days totalling 79.8mm. Demanding conditions — pack for it and plan indoor options.
December in Ostend averages a daily high of 7.3°C with nights around 3.7°C. Expect roughly 18.1 wet days totalling 77.8mm. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Ostend peaks at 77.
Based on 30 years of records, June–September scores highest for comfort in Ostend, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 22.2°C.
August is the wettest, averaging 81.3mm of rain across roughly 12.7 wet days.
January is the coolest month, with average daily highs around 6.4°C.