Surf Forecasts:
How big are the waves at Castlerock today (24 Sep):
- Morning surf: Morning surf (24 Sep, local time) - 2.5ft (0.8m), 10s period with NW swell.
- Afternoon surf: Afternoon surf (24 Sep, local time) - 2.5ft (0.8m), 10s period with NW swell.
- Evening surf: Evening surf (24 Sep, local time) - 6ft (1.8m), 18s period with NW swell.
The current surf forecast for Castlerock at 12PM is: 0.8m 10s primary swell from a Northwest direction and 0.4m 13s secondary swell from a Northwest direction (forecast issued at 06:00am September 24). An open ocean swell of 0.7m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (24 Sep) | 2.5ft (0.8m) | 10s |
| Afternoon (24 Sep) | 2.5ft (0.8m) | 10s |
| Evening (24 Sep) | 6ft (1.8m) | 18s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu afternoon, min 12°C on Thu morning). Mainly fresh winds. | |||||||||||||||||||||||
Thursday 24 | Friday 25 | Saturday 26 | |||||||||||||||||||||
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) | NW 11 | NW 11 | NW 10 | NW 10 | 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 | 258 | 191 | 122 | 82 | 129 | 286 | 1947 | 2652 | 2386 | 2201 | 2119 | 1641 | 1407 | 1116 | 905 | 772 | 700 | 561 | 515 | 389 | 344 | 258 | 254 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off |
High Tide | 5:29AM1.43m | 5:49PM1.76m | 5:57AM1.55m | 6:16PM1.88m | 6:27AM1.66m | 6:46PM1.97m | |||||||||||||||||
Low Tide | 11:42AM0.23m | 00:20AM0.24m | 12:10PM0.13m | 00:47AM0.14m | 12:39PM0.06m | ||||||||||||||||||
 |  |  | | |  |  | | | | | | |  | |  | | |  | | | | | |
 | — | 7:15 | — | — | — | — | — | — | — | 7:16 | — | — | — | — | — | — | — | 7:18 | — | — | — | — | — |
 | — | — | — | — | — | 7:22 | — | — | — | — | — | — | — | 7:19 | — | — | — | — | — | — | — | 7:16 | — |
mm | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 11 | 12 | 15 | 17 | 17 | 12 | 13 | 12 | 12 | 12 | 14 | 15 | 14 | 12 | 12 | 13 | 13 | 13 | 15 | 16 | 16 | 14 |
Feels °C | 7 | 6 | 6 | 10 | 14 | 14 | 8 | 11 | 8 | 8 | 8 | 9 | 10 | 10 | 7 | 7 | 7 | 8 | 8 | 10 | 11 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | NW 11 | NW 11 | NW 10 | NW 10 | 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 | 258 | 191 | 122 | 82 | 129 | 286 | 1947 | 2652 | 2386 | 2201 | 2119 | 1641 | 1407 | 1116 | 905 | 772 | 700 | 561 | 515 | 389 | 344 | 258 | 254 |
Swell 2 Height (m) Direction Period (s) | — | — | NW 13 | NW 13 | ESE 4 | ESE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 27 | 58 | 7 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SE 3 | SE 3 | SE 4 | S 4 | S 2 | — | — | — | — | — | — | — | — | — | S 2 | S 3 | S 3 | SSW 3 | S 3 | S 3 | S 3 | S 3 |
| kJ | — | 2 | 9 | 15 | 7 | 1 | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 2 | 4 | 5 | 3 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 2 | 339 | 377 | 194 | 0 | 9 | 9 | 0 | 9 | 9 | 9 | 9 | 9 | 9 | 0 | 14 | 187 | 9 | 162 | 429 | 44 | 14 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
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