Surf Forecasts:
How big are the waves at Castlerock today (25 Sep):
- Morning surf: Morning surf (25 Sep, local time) - 7ft (2.1m), 16s period with NW swell.
- Afternoon surf: Afternoon surf (25 Sep, local time) - 6ft (1.9m), 14s period with NW swell.
- Evening surf: Evening surf (25 Sep, local time) - 5.5ft (1.7m), 13s period with NW swell.
The current surf forecast for Castlerock at 1AM is: 2.2m 17s primary swell from a Northwest direction (forecast issued at 06:00pm September 24). The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 Sep) | 7ft (2.1m) | 16s |
| Afternoon (25 Sep) | 6ft (1.9m) | 14s |
| Evening (25 Sep) | 5.5ft (1.7m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Very mild (max 17°C on Thu afternoon, min 12°C on Thu night). Mainly fresh winds. | |||||||||||||||||||
Thu 24 | Friday 25 | Saturday 26 | |||||||||||||||||
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 10 | WNW 13 | NW 18 | NW 17 | NW 16 | NW 16 | NW 16 | NW 15 | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 129 | 286 | 1947 | 2652 | 2386 | 2201 | 2119 | 1641 | 1407 | 1116 | 905 | 772 | 700 | 678 | 515 | 389 | 338 | 258 | 254 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off |
High Tide | 5:49PM1.76m | 5:57AM1.55m | 6:16PM1.88m | 6:27AM1.66m | 6:46PM1.97m | ||||||||||||||
Low Tide | 00:20AM0.24m | 12:10PM0.13m | 00:47AM0.14m | 12:39PM0.06m | |||||||||||||||
 |  |  | |  | | | |  | |  | | |  | |  | | | | |
 | — | — | — | — | — | 7:16 | — | — | — | — | — | — | — | 7:18 | — | — | — | — | — |
 | — | 7:22 | — | — | — | — | — | — | — | 7:19 | — | — | — | — | — | — | — | 7:16 | — |
mm | — | 1 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 14 | 13 | 12 | 12 | 12 | 14 | 15 | 13 | 12 | 13 | 14 | 13 | 14 | 16 | 17 | 16 | 14 |
Feels °C | 13 | 13 | 10 | 11 | 8 | 8 | 8 | 10 | 10 | 9 | 6 | 6 | 8 | 8 | 9 | 11 | 12 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | NW 10 | WNW 13 | NW 18 | NW 17 | NW 16 | NW 16 | NW 16 | NW 15 | NW 14 | NW 13 | NW 13 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 |
| kJ | 129 | 286 | 1947 | 2652 | 2386 | 2201 | 2119 | 1641 | 1407 | 1116 | 905 | 772 | 700 | 678 | 515 | 389 | 338 | 258 | 254 |
Swell 2 Height (m) Direction Period (s) | — | E 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 4 | SSE 4 | — | — | — | — | — | — | — | — | — | S 3 | S 3 | S 3 | SSW 3 | SSW 3 | SSW 3 | S 3 | S 2 |
| kJ | 13 | 5 | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 3 | 3 | 3 | 2 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 194 | 387 | 27 | 0 | 9 | 9 | 9 | 9 | 9 | 9 | 14 | 387 | 187 | 187 | 162 | 9 | 44 | 44 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
Header Global | |||||||||||||||||||
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