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Weather Forecasts

Today
High
16°
Low
13°
40%
F6
Tomorrow
High
21°
Low
11°
10%
F4
Fri, 1 May
High
18°
Low
9°
35%
F2
Sat, 2 May
High
16°
Low
10°
20%
F2
Sun, 3 May
High
15°
Low
10°
55%
F3
Mon, 4 May
High
15°
Low
8°
60%
F3
Tue, 5 May
High
16°
Low
10°
15%
F3
Morning
Sunrise 04:53
Max
16°
40%
F6
Sunny periods but a chance of the odd shower, possibly thundery. Wind east to northeast fresh F5 to strong F6, occasionally moderate F4 in Guernsey, perhaps occasionally strong F7 in Alderney.
UV 6
Afternoon
Sunset 19:24
Max
16°
15%
F6
Mainly sunny, but the sunshine turning hazy, then becoming rather cloudy in the evening. Wind east to northeast fresh F5 to strong F6, perhaps occasionally strong F7 in Alderney.
UV 6
Night
Waxing Gibbous
Min
13°
10%
F5
Rather cloudy but with some clear spells. Wind east fresh F5 to strong F6, perhaps occasionally strong F7 in Alderney at first, occasionally moderate F4 later.

Shipping Forecast

General Situation
At 18:00UTC high, 1033mb, North sea, expected Denmark by midday Thursday with little change.

12.9°C
Sea Temperature

Forecast from 00:00UTC Wednesday to 00:00UTC Thursday.
Wind
Northeast 6 to 7, occasionally 4 to 5 in the south, veering east later.
Sea State
Slight to moderate, increasing rather rough to rough in the north and west overnight.
Weather
Isolated showers, perhaps heavy and thundery, becoming mainly in the south and west later.
Visibility
Good, occasionally moderate, perhaps locally poor.
Outlook from 00:00UTC Thursday to 00:00UTC Friday.
Wind
Easterly 5 to 7, veering southeast to south 2 to 4 later.
Sea State
Slight to moderate in the southeast, rather rough to rough in the north and west until evening.
Weather
Isolated showers, mainly in the south and west.
Visibility
Good, locally occasionally moderate.

Understanding the Forecast

The wind speed is given in the Beaufort Scale on an 8 point compass with a variability of +-45°. Terms commonly used in association with the wind and other parts of the forecast include:

Veering - a change of wind in the clockwise sense (up to 180°)
Backing – a change of wind in the anticlockwise sense (up to 180°)
At first – within the first 12 hours
Later – within the latter 12 hours
Occasional/occasionally – lasts less than half the time (location or time specific)
At times – non-persistent (lasts more than half the forecast period)
For a time – a transient state

Waves or sea state is the forecast of the mean of the largest 7% of combined wind and swell waves. Wind waves are locally produced waves; swell waves are produced by distant strong winds. Sea state descriptions equate to the following wave heights:

Description

Height

Smooth

< 0.5m

Slight

0.5 - 1.25m

Moderate

1.25 - 2.5m

Rough

2.5 - 4.0m

Very Rough

4.0 - 6.0m

High

6.0 - 9.0m

Very High

9.0 - 14.0m

Phenomenal

> 14m

Visibility measurements equate to the following distances in nautical miles and kilometers:

Description

Distance N.Mi

Distance Km

Good

> 5 n.mi

> 10 km

Moderate

2 - 5 n.mi

3.7 - 9 km

Poor

0.6 - 2 n.mi

1.0 - 3.7 km

Very Poor

< 0.6 n.mi

< 1000 m

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