British Beaches

Sand, sea, sun, surf and scones

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Morfa Bychan - Black Rock Sands Beach

Porthmadog, Gwynedd

An area of sand backed by dunes at the northern edge of the mouth of Tremadog Bay.

Weather and Tides


16 August 2017

Light Rain

Maximum Temperature17°C (63°F)
Minimum Temperature15°C (59°F)
Wind DirectionSoutherly
Wind Speed20mph
VisibilityVery Good
UV Risk3
Sunrise05:59 BST
Sunset20:42 BST


17 August 2017

Light Cloud

Maximum Temperature18°C (64°F)
Minimum Temperature13°C (55°F)
Wind DirectionSouth South Westerly
Wind Speed12mph
VisibilityVery Good
UV Risk6
Sunrise06:00 BST
Sunset20:40 BST


18 August 2017

Heavy Rain Shower

Maximum Temperature16°C (61°F)
Minimum Temperature12°C (54°F)
Wind DirectionWest South Westerly
Wind Speed23mph
VisibilityVery Good
UV Risk4
Sunrise06:02 BST
Sunset20:38 BST


High tide: 03:19 BST
(02:19 16 August 2017 GMT)

High tide: 15:57 BST
(14:57 16 August 2017 GMT)


High tide: 04:41 BST
(03:41 17 August 2017 GMT)

High tide: 17:19 BST
(16:19 17 August 2017 GMT)


High tide: 05:58 BST
(04:58 18 August 2017 GMT)

High tide: 18:33 BST
(17:33 18 August 2017 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 (