Surf Forecasts:
How big are the waves at Castlerock today (19 Oct):
- Morning surf: Morning surf (19 Oct, local time) - 2.5ft (0.8m), 16s period with NW swell.
- Afternoon surf: Afternoon surf (19 Oct, local time) - 4ft (1.2m), 15s period with NW swell.
- Evening surf: Evening surf (19 Oct, local time) - 4.5ft (1.4m), 14s period with NW swell.
The current surf forecast for Castlerock at 5AM is: 0.4m 13s primary swell from a West-northwest direction and 0.3m 17s secondary swell from a Northwest direction (forecast issued at 12:00am October 19). The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Oct) | 2.5ft (0.8m) | 16s |
| Afternoon (19 Oct) | 4ft (1.2m) | 15s |
| Evening (19 Oct) | 4.5ft (1.4m) | 14s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 14mm), heaviest on Tue night. Very mild (max 12°C on Tue morning, min 7°C on Sun night). Winds increasing (light winds from the SSE on Mon morning, near gales from the WNW by Wed morning). | ||||||||||||||||||||||||
Monday 19 | Tuesday 20 | Wednesday 21 | ||||||||||||||||||||||
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 | 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) | WNW 13 | WNW 13 | NW 16 | NW 16 | NW 15 | 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 12 | WNW 11 | WNW 12 | NW 11 | NW 10 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 96 | 55 | 208 | 352 | 595 | 705 | 836 | 813 | 791 | 656 | 511 | 503 | 386 | 380 | 392 | 386 | 325 | 341 | 471 | 625 | 606 | 2502 | 2877 | 1391 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross | cross | cross-off |
High Tide | 11:25PM0.98m | 2:03PM1.18m | 2:35AM0.98m | 3:28PM1.30m | 3:42AM1.11m | 4:06PM1.45m | ||||||||||||||||||
Low Tide | 6:52AM0.71m | 8:58PM0.76m | 8:34AM0.65m | 10:01PM0.64m | 9:38AM0.54m | |||||||||||||||||||
 | | |  |  | | | | | |  | | |  |  | | |  | |  | | | | | |
 | — | — | 8:03 | — | — | — | — | — | — | — | 8:04 | — | — | — | — | — | — | — | 8:07 | — | — | — | — | — |
 | — | — | — | — | — | 6:19 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:14 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 5 | 5 | 2 | — | — | — |
Temp °C | 8 | 7 | 7 | 7 | 10 | 11 | 11 | 10 | 9 | 9 | 9 | 10 | 12 | 11 | 10 | 10 | 10 | 10 | 10 | 8 | 9 | 10 | 9 | 8 |
Feels °C | 4 | 3 | 3 | 4 | 7 | 7 | 7 | 7 | 5 | 3 | 3 | 4 | 6 | 6 | 5 | 5 | 5 | 6 | 7 | -3 | -1 | 0 | 1 | 3 |
Swell 1 Height (m) Direction Period (s) | WNW 13 | WNW 13 | NW 16 | NW 16 | NW 15 | 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 12 | NW 13 | — | — | NW 14 |
| kJ | 96 | 55 | 208 | 352 | 595 | 705 | 836 | 813 | 791 | 656 | 511 | 503 | 386 | 380 | 392 | 386 | 325 | 341 | 471 | 625 | 380 | — | — | 234 |
Swell 2 Height (m) Direction Period (s) | NW 18 | NW 17 | WNW 12 | WNW 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | ESE 5 | E 4 | — | — | — |
| kJ | 12 | 47 | 48 | 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 13 | 3 | — | — | — |
Swell 3 Height (m) Direction Period (s) | N 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | E 3 | E 4 | ESE 4 | ESE 3 | SE 3 | SE 3 | SE 3 | SE 3 | SE 3 | ESE 3 | SE 3 | SE 3 | ESE 3 | ESE 4 | — | WNW 11 | WNW 12 | NW 11 | NW 10 |
| kJ | — | — | — | — | — | 3 | 7 | 5 | 2 | 4 | 8 | 6 | 5 | 2 | 3 | 4 | 5 | 4 | 8 | — | 606 | 2502 | 2877 | 1391 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 2 | 2 | 2 | 2 | 2 | 0 | 66 | 150 | 282 | 282 | 9 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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