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Bordeaux Harbour
Bordeaux Harbour Picture by Peter Frankland
Today
High
12°
Low
8°
20%
F4
Tomorrow
High
10°
Low
8°
10%
F4
Sat, 20 Dec
High
10°
Low
8°
10%
F5
Sun, 21 Dec
High
10°
Low
6°
45%
F4
Mon, 22 Dec
High
10°
Low
6°
25%
F3
Tue, 23 Dec
High
11°
Low
7°
25%
F3
Wed, 24 Dec
High
11°
Low
6°
30%
F4
Morning, Today
High
12°
Sunny periods and the slight chance of a shower.
20%
1
UV
F4
West to southwest moderate F4, occasionally light F3.
Sunrise 08:03
Afternoon
High
12°
Mainly sunny.
10%
1
UV
F3
West to southwest light F3 to moderate F4.
Sunset 16:13
Night
Low
8°
Mostly clear, perhaps cloudier towards dawn.
10%
F4
West to southwest light F3, backing south to southeast moderate F4.
New

Shipping Forecast

General Situation
At 12:00UTC complex low, 961mb, 200 miles south of Iceland, expected slow moving and filling to 978mb by midday Saturday. Associated fronts affecting the area today and tonight.

11.2°C
Sea Temperature

Forecast from 18:00UTC Thursday to 18:00UTC Friday.
Wind
South to southwest 5 to 6, with gusts to 40kt briefly possible at first, veering west 4 to 5 by midnight, with gusts to 30kt near any showers, gradually backing southwest 3 to 4 through Friday.
Sea State
Rather rough to very rough, gradually decreasing slight to moderate with a moderate swell.
Weather
Rain or showers this evening, perhaps locally heavy. Risk of isolated showers through Friday.
Visibility
Moderate or good, locally poor this evening, becoming generally good after midnight.
Outlook from 18:00UTC Friday to 18:00UTC Saturday.
Wind
Southwest 3 to 4, backing south to southeast 4 to 5 overnight, increasing 5 to 6 by midday, with gusts to 35kt possible later.
Sea State
Slight to moderate, decreasing smooth to slight overnight, then gradually increasing moderate to rather rough through Saturday. A moderate swell throughout.
Weather
Risk of isolated showers at first, then again towards dusk Saturday.
Visibility
Good or very good.

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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