Surf Forecasts:
How big are the waves at Castlerock today (23 Oct):
- Morning surf: Morning surf (23 Oct, local time) - 5ft (1.5m), 13s period with NW swell.
- Afternoon surf: Afternoon surf (23 Oct, local time) - 6ft (1.9m), 13s period with NW swell.
- Evening surf: Evening surf (23 Oct, local time) - 5ft (1.6m), 13s period with NW swell.
The current surf forecast for Castlerock at 11AM is: 1.5m 13s primary swell from a Northwest direction and 1.2m 12s secondary swell from a Northwest direction (forecast issued at 06:00am October 23). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Oct) | 5ft (1.5m) | 13s |
| Afternoon (23 Oct) | 6ft (1.9m) | 13s |
| Evening (23 Oct) | 5ft (1.6m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 27mm), heaviest during Sat afternoon. Very mild (max 12°C on Sat morning, min 7°C on Fri morning). Winds increasing (light winds from the SW on Fri night, gales from the WSW by Sat night). | |||||||||||||||||||||||
Friday 23 | Saturday 24 | Sunday 25 | |||||||||||||||||||||
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 | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | NW 11 | NW 11 | NW 13 | NW 12 | NW 13 | NW 13 | NW 13 | NW 13 | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | WNW 12 | WNW 14 | NW 16 | NW 16 | NW 16 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 176 | 176 | 710 | 335 | 1154 | 609 | 1069 | 1021 | 1052 | 919 | 744 | 459 | 407 | 1384 | 5330 | 14863 | 17128 | 15279 | 11287 | 9282 | 7305 | 5565 | 3993 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross |
High Tide | 4:53AM1.40m | 5:08PM1.74m | 5:26AM1.54m | 5:40PM1.85m | 5:59AM1.67m | 6:14PM1.93m | |||||||||||||||||
Low Tide | 10:59AM0.31m | 11:41PM0.22m | 11:33AM0.21m | 00:10AM0.12m | 12:07PM0.13m | ||||||||||||||||||
 | |  | |  |  | |  | | | | |  | | | | |  |  |  | | | | |
 | — | 8:11 | — | — | — | — | — | — | — | 8:12 | — | — | — | — | — | — | — | 7:15 | — | — | — | — | — |
 | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 5:05 | — | — |
mm | 1 | 3 | 4 | 2 | — | — | — | — | — | — | 2 | 5 | 6 | 1 | — | 1 | 1 | 1 | 1 | — | 1 | 1 | 1 |
Temp °C | 9 | 7 | 7 | 9 | 10 | 9 | 8 | 7 | 8 | 8 | 9 | 12 | 11 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 10 |
Feels °C | 5 | 2 | -1 | 0 | 1 | 2 | 2 | 3 | 4 | 2 | 0 | 4 | 2 | -3 | -5 | -4 | -5 | -4 | -4 | -4 | -3 | 0 | 1 |
Swell 1 Height (m) Direction Period (s) | NW 11 | NW 11 | NW 12 | NW 12 | — | NW 13 | NW 13 | NW 13 | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | WNW 12 | — | — | — | — | — | — | — | — | NW 13 |
| kJ | 176 | 176 | 456 | 335 | — | 609 | 1069 | 1021 | 1052 | 919 | 744 | 459 | 407 | 1384 | — | — | — | — | — | — | — | — | 3993 |
Swell 2 Height (m) Direction Period (s) | NNW 6 | NW 14 | — | — | — | — | — | — | — | — | — | — | ESE 6 | ESE 5 | — | — | — | — | — | — | — | — | — |
| kJ | 4 | 47 | — | — | — | — | — | — | — | — | — | — | 20 | 3 | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | E 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | WNW 2 | NW 13 | NW 6 | NW 13 | NW 6 | — | — | — | S 3 | SE 4 | SSE 5 | SW 4 | WSW 4 | WNW 14 | NW 16 | NW 16 | NW 16 | NW 14 | NW 14 | NW 14 | NW 13 | — |
| kJ | — | 1 | 710 | 122 | 1154 | 136 | — | — | — | 2 | 16 | 63 | 18 | 49 | 5330 | 14863 | 17128 | 15279 | 11287 | 9282 | 7305 | 5565 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 9 | 150 | 71 | 157 | 341 | 398 | 380 | 9 | 0 | 0 | 273 | 938 | 1081 | 1034 | 1092 | 1081 | 1081 | 1081 | 862 | 862 | 772 | 380 | 387 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
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