Foulness Island

Island Tidal island in Essex, largely military firing range

Off Essex, Foulness Island presents broad saltmarshes, remote beaches and birdwatching; public access is restricted in places, so visits are often limited or scheduled.

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Foulness Island is a low-lying island off the coast of Essex in eastern England, within the Thames estuary and administratively part of the county of Essex. It comprises farmland, salt marsh and scattered settlements and has long been used for military testing and training, which limits public access in parts.

The island’s landscape is characterised by reclaimed agricultural land behind sea walls and extensive tidal flats and marshes that attract coastal birds and provide pastoral scenery. Public roads and causeways connect parts of the island to the mainland, but access is controlled in areas used by the Ministry of Defence.

Historically the island has been inhabited and farmed for centuries and has also been used for defence purposes, including weapons testing and ranges. These military uses expanded in the 20th century and continue to shape land ownership and access.

Foulness lies off the Essex coast in the Thames estuary to the east of the mainland, within Rochford district and south of the estuary approaches to the River Thames and the port areas downstream of London.

  • Access restrictions: Much of the island is owned or used by the Ministry of Defence, and public access can be restricted; check local access arrangements before planning a visit.
Foulness Island
51.5833, 0.9000

Best Time to Visit Foulness Island #

Late spring through summer offers the best weather and wildlife-watching opportunities on this coastal island.

Spring
Mar-May · 5-15°C
An active time for migratory and breeding birds; cool, changeable weather but good for birdwatching.
Summer
Jun-Aug · 15-20°C
Mild and the warmest period with longer daylight-best for coastal walks and outdoor wildlife viewing.
Autumn/Winter
Sep-Feb · 0-10°C
Cooler, windier and wetter; migration in autumn can be rewarding for birders but conditions are more variable.

Weather & Climate near Foulness Island #

Climate

Temperate climate with mild summers (peaking in August) and cold winters (coldest in February). Temperatures range from 2°C to 22°C. Moderate rainfall (509 mm/year).

Best Time to Visit
AugustJulySeptember
Temperature & Rainfall
Temperature Range
31°
Warmest Month
-5°
Coldest Month
Monthly Conditions

January

January is cold with highs of 7°C and lows of 2°C. Moderate rainfall (43 mm) and mostly overcast skies.

50 Acceptable

Comfort

Feels Like Cold
C
Temperature
91%
Humidity
Very Humid

Weather

43 mm
Rainfall
5.6 m/s
Wind
Light Breeze
0.1
UV Index
Low
8.2h daylight

February

February is the coolest month with highs of 7°C and lows of 2°C. The driest month with just 29 mm and mostly overcast skies.

52 Acceptable

Comfort

Feels Like Cold
C
Temperature
89%
Humidity
Very Humid

Weather

29 mm
Rainfall
5.3 m/s
Wind
Light Breeze
0.2
UV Index
Low
9.8h daylight

March

March is cold with highs of 10°C and lows of 3°C. Moderate rainfall (36 mm) and mostly overcast skies.

58 Acceptable

Comfort

Feels Like Cold
C
Temperature
10°
85%
Humidity
Very Humid

Weather

36 mm
Rainfall
5.2 m/s
Wind
Light Breeze
0.4
UV Index
Low
11.7h daylight

April

April is cold with highs of 12°C and lows of 4°C. Moderate rainfall (33 mm) and partly cloudy skies.

62 Good

Comfort

Feels Like Cold
C
Temperature
12°
82%
Humidity
Very Humid

Weather

33 mm
Rainfall
4.9 m/s
Wind
Light Breeze
0.8
UV Index
Moderate
13.7h daylight

May

May is cool with highs of 16°C and lows of 8°C. Moderate rainfall (37 mm) and mostly overcast skies.

68 Good

Comfort

12°
Feels Like Cool
12°C
Temperature
16°
80%
Humidity
Very Humid

Weather

37 mm
Rainfall
4.8 m/s
Wind
Light Breeze
1.1
UV Index
High
15.4h daylight

June

June is cool with highs of 19°C and lows of 10°C. Moderate rainfall (49 mm) and mostly overcast skies.

66 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
11° 19°
79%
Humidity
Very Humid

Weather

49 mm
Rainfall
4.4 m/s
Wind
Light Breeze
1.4
UV Index
High
16.3h daylight

July

July is cool with highs of 21°C and lows of 13°C. Moderate rainfall (37 mm) and partly cloudy skies.

74 Very Good

Comfort

17°
Feels Like Cool
17°C
Temperature
13° 21°
78%
Humidity
Very Humid

Weather

37 mm
Rainfall
4.4 m/s
Wind
Light Breeze
1.4
UV Index
High
15.9h daylight

August

August is cool with highs of 22°C and lows of 13°C. Moderate rainfall (45 mm) and partly cloudy skies.

80 Excellent

Comfort

17°
Feels Like Cool
17°C
Temperature
13° 22°
79%
Humidity
Very Humid

Weather

45 mm
Rainfall
4.4 m/s
Wind
Light Breeze
1.1
UV Index
High
14.4h daylight

September

September is cool with highs of 19°C and lows of 11°C. Moderate rainfall (47 mm) and partly cloudy skies.

70 Very Good

Comfort

15°
Feels Like Cool
15°C
Temperature
11° 19°
82%
Humidity
Very Humid

Weather

47 mm
Rainfall
4.6 m/s
Wind
Light Breeze
0.7
UV Index
Moderate
12.5h daylight

October

October is cool with highs of 14°C and lows of 8°C. The wettest month with 54 mm of rain and mostly overcast skies.

58 Acceptable

Comfort

11°
Feels Like Cool
11°C
Temperature
15°
86%
Humidity
Very Humid

Weather

54 mm
Rainfall
4.9 m/s
Wind
Light Breeze
0.3
UV Index
Low
10.5h daylight

November

November is cold with highs of 10°C and lows of 4°C. Moderate rainfall (53 mm) and mostly overcast skies.

56 Acceptable

Comfort

Feels Like Cold
C
Temperature
10°
91%
Humidity
Very Humid

Weather

53 mm
Rainfall
5.0 m/s
Wind
Light Breeze
0.1
UV Index
Low
8.7h daylight

December

December is cold with highs of 8°C and lows of 3°C. Moderate rainfall (46 mm) and mostly overcast skies.

48 Poor

Comfort

Feels Like Cold
C
Temperature
93%
Humidity
Very Humid

Weather

46 mm
Rainfall
5.3 m/s
Wind
Light Breeze
0.0
UV Index
Low
7.7h daylight

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