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Black Rock Sands Weather and Tides

Gwynedd, Wales

Latest Observations

09:00 Fri 18 Sep

15°C

Sea Temperature

0°C

Latest weather observations are for the nearest observation point and may not necessarily be accurate for this beach, especially when the weather is very changeable. Sea temperatures are the latest satellite surface temperature measurement for open water closest to the beach. Sea temperatures are a guideline only and can be affected by local conditions.

Fri

17°C

Sat

18°C

Sun

17°C

Mon

19°C

Tue

20°C

Wed

19°C

First light 05:40 Dawn 06:21 Sunrise 06:55 Sunset 19:25 Dusk 20:00 Nightfall 20:41 First Quarter Moon

18 September 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00
Summary
Chance of Rain 28% 52% 74% 92% 93% 93% 93% 100% 99% 88% 75% 63% 56% 56%
Temperature 15°C 16°C 16°C 16°C 16°C 16°C 16°C 17°C 17°C 17°C 17°C 17°C 17°C 17°C
Feels like 15°C 16°C 16°C 16°C 16°C 16°C 17°C 18°C 18°C 19°C 19°C 19°C 19°C 19°C
Humidity 77% 73% 74% 76% 80% 82% 84% 85% 86% 87% 88% 90% 90% 90%
Visibility Good Very Good Very Good Good Moderate Moderate Moderate Moderate Moderate Good Good Good Good Good
Pressure 1,012 mb 1,012 mb 1,012 mb 1,012 mb 1,011 mb 1,011 mb 1,010 mb 1,010 mb 1,010 mb 1,010 mb 1,010 mb 1,010 mb 1,010 mb 1,010 mb
Wind Direction
Wind Speed 15mph 18mph 20mph 21mph 22mph 22mph 22mph 22mph 22mph 22mph 21mph 20mph 20mph 20mph
Gusting to 30mph 34mph 36mph 37mph 39mph 40mph 39mph 39mph 38mph 37mph 36mph 36mph 35mph 36mph
Beaufort Scale
4
Moderate Breeze
4
Moderate Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze
5
Fresh Breeze

Weather forecast and current observations are supplied by the Met Office. Forecast is for the nearest Met Office forecast location and may not be precisely accurate for this beach. Sea surface temperatures are generated using E.U. Copernicus Marine Service Information.

Seven Day Tides

Sorry, we don't have a full tidal dataset for this location, so we can't show a seven day tidal graph. But we can show you the estimated high and low tide times.

Friday

18 September

Fri

Low

Low

0m 

07:13 BST
06:13 GMT

High

High

3.53m 

13:24 BST
12:24 GMT

Low

Low

0m 

19:35 BST
18:35 GMT

Saturday

19 September

Sat

High

High

3.21m 

01:46 BST
00:46 GMT

Low

Low

0m 

08:02 BST
07:02 GMT

High

High

3.08m 

14:19 BST
13:19 GMT

Low

Low

0m 

20:36 BST
19:36 GMT

Sunday

20 September

Sun

High

High

2.74m 

02:54 BST
01:54 GMT

Low

Low

0m 

09:25 BST
08:25 GMT

High

High

2.78m 

15:57 BST
14:57 GMT

Low

Low

0m 

22:28 BST
21:28 GMT

Monday

21 September

Mon

High

High

2.58m 

05:00 BST
04:00 GMT

Low

Low

0m 

11:27 BST
10:27 GMT

High

High

2.97m 

17:53 BST
16:53 GMT

Tuesday

22 September

Tue

Low

Low

0m 

00:13 BST
23:13 GMT

High

High

2.95m 

06:32 BST
05:32 GMT

Low

Low

0m 

12:44 BST
11:44 GMT

High

High

3.48m 

18:56 BST
17:56 GMT

Wednesday

23 September

Wed

Low

Low

0m 

01:08 BST
00:08 GMT

High

High

3.48m 

07:21 BST
06:21 GMT

Low

Low

0m 

13:29 BST
12:29 GMT

High

High

4.01m 

19:37 BST
18:37 GMT

Important! Tide times are for the nearest measurement point (Porthmadog) and may not be accurate for this beach. You should not rely on these times for anything other than a broad indication of when the tide will be at its highest or lowest.

In particular, these tide times are not suitable for navigational use.

Accurate tide forecasts require complex calculations and detailed local information. If you intend to engage in any activity for which tidal information is important for safety reasons (including sailing, powerboating, diving, and surfing) then you should obtain professional data.

Tidal predictions are © Crown Copyright and/or database rights. Reproduced by permission of the Controller of Her Majesty's Stationery Office and the UK Hydrographic Office (www.ukho.gov.uk).

Location: Morfa Bychan

Location type: Village

OS Grid: SH542363

Coordinates: 52°54'18"N 4°10'4"W

Mapcode: GBR 5N.P203

What 3 Words: refusals.buddy.headlight

Coordinates and location codes are for an approximate mid-point of the beach, and may not reflect the best access point or the most popular part of the beach.

Country: Wales

Local Authority: Gwynedd

Parish: Porthmadog

Nearest postcode: LL49 9YP

(for sat-nav purposes only, a beach does not have a postal address!)

Black Rock Sands weather and tides. Includes 7 day weather forecast, current weather observations, 7 day tide charts, sunrise, sunset, moon phases, air quality forecast and UV index.

British Beaches is a Good Stuff website.

216.73.216.94 Fri, 18 Sep 2026 10:45:34 +0100