Surf Forecasts:
How big are the waves at Castlerock today (20 Oct):
- Morning surf: Morning surf (20 Oct, local time) - 4ft (1.2m), 13s period with NW swell.
- Afternoon surf: Afternoon surf (20 Oct, local time) - 3.5ft (1.1m), 13s period with NW swell.
- Evening surf: Evening surf (20 Oct, local time) - 3.5ft (1.1m), 13s period with NW swell.
The current surf forecast for Castlerock at 1AM is: 1.4m 14s primary swell from a Northwest direction (forecast issued at 06:00pm October 19). An open ocean swell of 0.4m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Oct) | 4ft (1.2m) | 13s |
| Afternoon (20 Oct) | 3.5ft (1.1m) | 13s |
| Evening (20 Oct) | 3.5ft (1.1m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Wed afternoon. Very mild (max 12°C on Mon afternoon, min 7°C on Wed night). Mainly strong winds. | |||||||||||||||||||
Mon 19 | Tuesday 20 | Wednesday 21 | |||||||||||||||||
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) | NW 15 | NW 15 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 10 | NW 9 | NW 13 | NW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 788 | 836 | 813 | 791 | 656 | 570 | 503 | 386 | 380 | 386 | 386 | 374 | 437 | 551 | 589 | 1324 | 952 | 553 | 609 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | glassy | cross | cross-on | cross-on | cross-on | cross |
High Tide | 2:03PM1.18m | 2:35AM0.98m | 3:28PM1.30m | 3:42AM1.11m | 4:06PM1.45m | ||||||||||||||
Low Tide | 8:58PM0.76m | 8:34AM0.65m | 10:01PM0.64m | 9:38AM0.54m | |||||||||||||||
 |  |  | |  | | |  | | | | | | | |  | | | | |
 | — | — | — | — | — | 8:04 | — | — | — | — | — | — | — | 8:07 | — | — | — | — | — |
 | 6:19 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:14 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — |
Temp °C | 11 | 12 | 10 | 9 | 8 | 9 | 10 | 12 | 11 | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 9 | 9 | 9 |
Feels °C | 7 | 9 | 7 | 6 | 4 | 4 | 4 | 7 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 1 | 1 | 1 | 3 |
Swell 1 Height (m) Direction Period (s) | NW 15 | NW 15 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | — | NW 14 | NW 13 | NW 8 |
| kJ | 788 | 836 | 813 | 791 | 656 | 570 | 503 | 386 | 380 | 386 | 386 | 374 | 437 | 551 | 589 | — | 465 | 553 | 305 |
Swell 2 Height (m) Direction Period (s) | — | — | E 4 | ESE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 13 |
| kJ | — | — | 7 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 609 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 4 | E 4 | E 4 | — | ESE 4 | SE 3 | SE 3 | SE 4 | SE 4 | ESE 3 | — | — | — | — | — | NW 10 | NW 9 | NW 8 | — |
| kJ | 4 | 4 | 7 | — | 5 | 4 | 9 | 10 | 6 | 4 | — | — | — | — | — | 1324 | 952 | 463 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 40 | 2 | 0 | 0 | 2 | 2 | 121 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 9 | 157 | 266 | 185 | 185 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest