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 (1.8m), 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 8PM is: 1.5m 13s primary swell from a Northwest direction and 1.3m 6s secondary swell from a Northwest direction (forecast issued at 12:00pm October 23). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Oct) | 5ft (1.5m) | 13s |
| Afternoon (23 Oct) | 6ft (1.8m) | 13s |
| Evening (23 Oct) | 5ft (1.6m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 22mm), heaviest during Sat afternoon. Very mild (max 11°C on Sat morning, min 7°C on Fri night). Winds increasing (light winds from the SW on Fri night, gales from the W by Sat night). | |||||||||||||||||||||
Fri 23 | Saturday 24 | Sunday 25 | |||||||||||||||||||
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 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 15 | NW 14 | NW 14 | NW 13 | NW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 710 | 335 | 1069 | 609 | 1069 | 1006 | 1052 | 919 | 744 | 459 | 407 | 1384 | 4873 | 15956 | 17570 | 15656 | 12734 | 9967 | 7878 | 5650 | 3993 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross |
High Tide | 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 | 3 | 1 | — | — | — | — | — | — | 1 | 5 | 6 | — | — | 1 | 1 | 1 | 1 | — | 1 | 1 | — |
Temp °C | 8 | 10 | 10 | 9 | 8 | 7 | 8 | 8 | 9 | 11 | 11 | 8 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 10 |
Feels °C | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 2 | 0 | 2 | 1 | -5 | -4 | -5 | -6 | -5 | -4 | -4 | -3 | 0 | 2 |
Swell 1 Height (m) Direction Period (s) | — | NW 12 | — | NW 13 | NW 13 | NW 13 | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | WNW 12 | — | — | — | — | — | — | — | — | NW 13 |
| kJ | — | 335 | — | 609 | 1069 | 1006 | 1052 | 919 | 744 | 459 | 407 | 1384 | — | — | — | — | — | — | — | — | 3993 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NW 6 | — | — | — | — | — | SE 5 | SE 5 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 96 | — | — | — | — | — | 29 | 4 | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 13 | NW 5 | NW 13 | NW 6 | — | — | — | — | SE 4 | SE 5 | SW 3 | WSW 4 | WNW 14 | NW 16 | NW 16 | NW 16 | NW 15 | NW 14 | NW 14 | NW 13 | — |
| kJ | 710 | 74 | 1069 | 118 | — | — | — | — | 12 | 49 | 11 | 47 | 4873 | 15956 | 17570 | 15656 | 12734 | 9967 | 7878 | 5650 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 398 | 157 | 398 | 398 | 303 | 9 | 9 | 0 | 287 | 938 | 965 | 968 | 707 | 707 | 707 | 1081 | 862 | 1115 | 772 | 772 | 387 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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