Belfast in August averages 30°C (86°F) during the day and 26°C (79°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
If you prefer dry days with pleasant temperatures, August may not be the ideal month to visit Belfast. Our weather planner can help you explore destinations with more pleasant weather conditions.
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Pick a month to see the average temperature, rainfall and sunshine in Belfast - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Belfast typically stay consistent throughout August, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 27°C (81°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Belfast spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
According to our 22 years of weather records for Belfast, the following extremes were recorded between 2004 and 2026.
Find out more about the weather in Jamaica and which places have the best travel conditions in this month. See all of Jamaica in August →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Belfast climate overview or explore weather in Jamaica.
Where to go in August - average daytime high across popular destinations.
Treasure Beach
31°C (88°F) Falmouth
32°C (90°F) Runaway Bay32°C (90°F) Ocho Rios
32°C (90°F) Montego Bay
32°C (90°F) Kingston31°C (88°F) Negril31°C (88°F) Port Antonio30°C (86°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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