Portsea Island weather

The Portsea Island weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Portsea Island, Hampshire, England in 2026/2027.

• Portsea Island weather averages
• Portsea Island weather by month
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Portsea Island weather averages

Check the Portsea Island weather averages for each month of the year including maximum daytime and minimum night-time temperatures, monthly rainfall, number of days with rain and average daily hours of sunshine for Portsea Island, Hampshire, England.

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Portsea Island weather by month

Check the weather for Portsea Island, Hampshire, England for a particular month by selecting from the list below. This gives the best indication of what to expect from the weather months in advance.

• January
• February
• March
• April
• May
• June
• July
• August
• September
• October
• November
• December

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Portsea Island weather in January

The average maximum daytime temperature in Portsea Island in January is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 2 hours of sunshine a day in Portsea Island during January.

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 17
  17 days with some rainfall
• 3
  3°C min night temperature
• 94
  94 mm of monthly rainfall

On average 94 mm (3.7 inches) of rain normally falls in Portsea Island during January with rain falling on 17 days of the month.

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Portsea Island weather in February

The average maximum daytime temperature in Portsea Island in February is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 3 hours of sunshine a day in Portsea Island during February.

• 8
  8°C max day temperature
• 3
  3 hours of sunshine per day
• 13
  13 days with some rainfall
• 3
  3°C min night temperature
• 66
  66 mm of monthly rainfall

On average 66 mm (2.6 inches) of rain normally falls in Portsea Island during February with rain falling on 13 days of the month.

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Portsea Island weather in March

The average maximum daytime temperature in Portsea Island in March is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 4 hours of sunshine a day in Portsea Island during March.

• 10
  10°C max day temperature
• 4
  4 hours of sunshine per day
• 15
  15 days with some rainfall
• 4
  4°C min night temperature
• 68
  68 mm of monthly rainfall

On average 68 mm (2.7 inches) of rain normally falls in Portsea Island during March with rain falling on 15 days of the month.

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Portsea Island weather in April

The average maximum daytime temperature in Portsea Island in April is a cool 12°C (54°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 6 hours of sunshine a day in Portsea Island during April.

• 12
  12°C max day temperature
• 6
  6 hours of sunshine per day
• 12
  12 days with some rainfall
• 5
  5°C min night temperature
• 55
  55 mm of monthly rainfall

On average 55 mm (2.2 inches) of rain normally falls in Portsea Island during April with rain falling on 12 days of the month.

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Portsea Island weather in May

The average maximum daytime temperature in Portsea Island in May is a comfortable 15°C (59°F), while the average minimum night-time temperature is a cool 8°C (46°F). You can expect on average 7 hours of sunshine a day in Portsea Island during May.

• 15
  15°C max day temperature
• 7
  7 hours of sunshine per day
• 12
  12 days with some rainfall
• 8
  8°C min night temperature
• 50
  50 mm of monthly rainfall

On average 50 mm (2 inches) of rain normally falls in Portsea Island during May with rain falling on 12 days of the month.

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Portsea Island weather in June

The average maximum daytime temperature in Portsea Island in June is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 8 hours of sunshine a day in Portsea Island during June.

• 18
  18°C max day temperature
• 8
  8 hours of sunshine per day
• 10
  10 days with some rainfall
• 11
  11°C min night temperature
• 50
  50 mm of monthly rainfall

On average 50 mm (2 inches) of rain normally falls in Portsea Island during June with rain falling on 10 days of the month.

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Portsea Island weather in July

The average maximum daytime temperature in Portsea Island in July is a comfortable 21°C (70°F), while the average minimum night-time temperature is a cool 13°C (55°F). You can expect on average 8 hours of sunshine a day in Portsea Island during July.

• 21
  21°C max day temperature
• 8
  8 hours of sunshine per day
• 9
  9 days with some rainfall
• 13
  13°C min night temperature
• 41
  41 mm of monthly rainfall

On average 41 mm (1.6 inches) of rain normally falls in Portsea Island during July with rain falling on 9 days of the month.

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Portsea Island weather in August

The average maximum daytime temperature in Portsea Island in August is a comfortable 21°C (70°F), while the average minimum night-time temperature is a cool 13°C (55°F). You can expect on average 7 hours of sunshine a day in Portsea Island during August.

• 21
  21°C max day temperature
• 7
  7 hours of sunshine per day
• 10
  10 days with some rainfall
• 13
  13°C min night temperature
• 58
  58 mm of monthly rainfall

On average 58 mm (2.3 inches) of rain normally falls in Portsea Island during August with rain falling on 10 days of the month.

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Portsea Island weather in September

The average maximum daytime temperature in Portsea Island in September is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 5 hours of sunshine a day in Portsea Island during September.

• 18
  18°C max day temperature
• 5
  5 hours of sunshine per day
• 12
  12 days with some rainfall
• 11
  11°C min night temperature
• 73
  73 mm of monthly rainfall

On average 73 mm (2.9 inches) of rain normally falls in Portsea Island during September with rain falling on 12 days of the month.

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Portsea Island weather in October

The average maximum daytime temperature in Portsea Island in October is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 4 hours of sunshine a day in Portsea Island during October.

• 14
  14°C max day temperature
• 4
  4 hours of sunshine per day
• 15
  15 days with some rainfall
• 9
  9°C min night temperature
• 93
  93 mm of monthly rainfall

On average 93 mm (3.7 inches) of rain normally falls in Portsea Island during October with rain falling on 15 days of the month.

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Portsea Island weather in November

The average maximum daytime temperature in Portsea Island in November is a cool 11°C (52°F), while the average minimum night-time temperature is a cold 6°C (43°F). You can expect on average 3 hours of sunshine a day in Portsea Island during November.

• 11
  11°C max day temperature
• 3
  3 hours of sunshine per day
• 15
  15 days with some rainfall
• 6
  6°C min night temperature
• 99
  99 mm of monthly rainfall

On average 99 mm (3.9 inches) of rain normally falls in Portsea Island during November with rain falling on 15 days of the month.

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Portsea Island weather in December

The average maximum daytime temperature in Portsea Island in December is a cool 9°C (48°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 2 hours of sunshine a day in Portsea Island during December.

• 9
  9°C max day temperature
• 2
  2 hours of sunshine per day
• 16
  16 days with some rainfall
• 4
  4°C min night temperature
• 98
  98 mm of monthly rainfall

On average 98 mm (3.9 inches) of rain normally falls in Portsea Island during December with rain falling on 16 days of the month.

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