Surf Forecasts:
How big are the waves at Castlerock today (12 Oct):
- Afternoon surf: Afternoon surf (12 Oct, local time) - 0.5ft (0.2m), 12s period with W swell.
- Evening surf: Evening surf (12 Oct, local time) - 0.5ft (0.2m), 12s period with WNW swell.
The current surf forecast for Castlerock at 11PM is: 0.2m 12s primary swell from a West-northwest direction and 0.1m 9s secondary swell from a Northwest direction (forecast issued at 06:00pm October 12). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Oct) | - | - |
| Afternoon (12 Oct) | 0.5ft (0.2m) | 12s |
| Evening (12 Oct) | 0.5ft (0.2m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 18mm), heaviest on Mon night. Very mild (max 18°C on Mon night, min 9°C on Tue night). Winds decreasing (strong winds from the W on Tue afternoon, light winds from the W by Thu morning). | |||||||||||||||||||
Mon 12 | Tuesday 13 | Wednesday 14 | |||||||||||||||||
4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | W 12 | WNW 12 | WNW 12 | WNW 12 | WNW 9 | W 8 | WNW 8 | WNW 8 | WNW 9 | WNW 9 | NW 12 | NW 12 | NW 12 | NW 12 | NW 12 | NW 13 | WNW 13 | WNW 14 | NW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 12 | 15 | 14 | 14 | 16 | 103 | 55 | 80 | 371 | 407 | 730 | 646 | 455 | 355 | 392 | 424 | 572 | 947 | 1551 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | off | off | off | off | off | off | off | off |
High Tide | 7:43PM1.79m | 7:56AM1.74m | 8:12PM1.66m | 8:26AM1.68m | 8:40PM1.51m | ||||||||||||||
Low Tide | 1:43PM0.09m | 2:00AM0.17m | 2:15PM0.17m | 2:24AM0.25m | 2:48PM0.29m | ||||||||||||||
 |  |  |  |  |  | |  |  | | | | | | | | | | | |
 | — | — | — | — | — | 7:50 | — | — | — | — | — | — | — | 7:52 | — | — | — | — | — |
 | 6:36 | — | — | — | — | — | — | — | 6:34 | — | — | — | — | — | — | — | 6:30 | — | — |
mm | — | — | — | 1 | 6 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 18 | 17 | 14 | 13 | 12 | 13 | 12 | 12 | 10 | 10 | 9 | 9 | 12 | 15 | 16 | 16 | 16 |
Feels °C | 15 | 13 | 15 | 13 | 10 | 7 | 5 | 5 | 3 | 5 | 5 | 5 | 4 | 2 | 5 | 7 | 8 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | ESE 5 | WNW 12 | WNW 12 | WNW 12 | ESE 4 | ESE 4 | WNW 8 | WNW 8 | NW 14 | WNW 9 | NW 12 | NW 12 | NW 12 | NW 12 | NW 12 | NW 13 | WNW 13 | WNW 14 | NW 16 |
| kJ | 9 | 15 | 14 | 14 | 3 | 2 | 55 | 80 | 65 | 407 | 730 | 646 | 455 | 355 | 392 | 424 | 572 | 947 | 1551 |
Swell 2 Height (m) Direction Period (s) | WNW 9 | NW 9 | NW 9 | W 9 | WNW 9 | SE 6 | SE 4 | — | — | NW 14 | NW 12 | — | — | NW 15 | — | — | — | — | — |
| kJ | 8 | 3 | 3 | 2 | 16 | 2 | 1 | — | — | 114 | 306 | — | — | 37 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 12 | NW 8 | N 7 | N 7 | WNW 11 | — | E 6 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 12 | 2 | 1 | 1 | 12 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SE 3 | SE 4 | SE 3 | SW 3 | W 8 | W 3 | W 4 | WNW 9 | — | — | SSW 2 | S 2 | SSE 3 | SSE 3 | SSE 4 | S 4 | S 4 | S 4 |
| kJ | — | 6 | 12 | 3 | 4 | 103 | 8 | 17 | 371 | — | — | 1 | 1 | 3 | 9 | 14 | 14 | 9 | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 40 | 266 | 56 | 187 | 404 | 751 | 341 | 347 | 772 | 347 | 9 | 0 | 0 | 348 | 492 | 690 | 690 | 492 | 67 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
Header Global | |||||||||||||||||||
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