Portsmouth Weather in August

During August, Portsmouth experiences very high daytime temperatures of 31°C (88°F) and cooler nights around 22°C (72°F). Expect quite a bit of rainfall. Around 129 mm (5.1 in) is typical.

Rainfall in Portsmouth in August

Typically around 11 days of rainfall are expected, averaging 129 mm (5.1 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Portsmouth in August

If you're visiting Portsmouth in August, expect highs of 31°C (88°F) and overnight lows around 22°C (72°F). It's usually most comfortable outside during the morning and later in the day. Nights remain mild at 22°C (72°F), making evenings a pleasant time to be outdoors.

Sunshine in Portsmouth in August

The month enjoys around 258 hours of sunshine, creating mostly sunny days with good weather conditions.

If you prefer enjoying temperate temperatures and rain-free days, April typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.