Surf Forecasts:
How big are the waves at Castlerock today (15 Jul):
- Morning surf: Morning surf (15 Jul, local time) - 0.5ft (0.1m), 9s period with W swell.
- Afternoon surf: Afternoon surf (15 Jul, local time) - 0.5ft (0.1m), 9s period with W swell.
- Evening surf: Evening surf (15 Jul, local time) - 0.5ft (0.1m), 10s period with W swell.
The current surf forecast for Castlerock at 4PM is: 0.1m 9s primary swell from a West direction and 0.1m 6s secondary swell from a Northwest direction, 0.2m 3s secondary swell from a East direction (forecast issued at 12:00pm July 15). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Jul) | 0.5ft (0.1m) | 9s |
| Afternoon (15 Jul) | 0.5ft (0.1m) | 9s |
| Evening (15 Jul) | 0.5ft (0.1m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 23°C on Wed afternoon, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 15 | Thursday 16 | Friday 17 | Sat 18 | |||||||||||||||||||||
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 | 1 AM | 4 AM | 7 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | W 9 | NW 9 | W 9 | W 9 | W 10 | W 10 | W 10 | W 9 | W 9 | NW 11 | NW 11 | NW 13 | NW 12 | NW 11 | NW 11 | NW 11 | NNW 5 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | N 6 | NNW 6 | NNW 6 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 5 | 5 | 6 | 21 | 19 | 19 | 18 | 26 | 55 | 77 | 115 | 143 | 166 | 100 | 134 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-off | glassy | glassy | glassy | glassy | glassy | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:22AM1.64m | 7:49PM2.03m | 8:05AM1.61m | 8:34PM2.05m | 8:45AM1.55m | 9:18PM2.00m | ||||||||||||||||||
Low Tide | 1:39PM0.05m | 2:30AM0.09m | 2:20PM0.01m | 3:15AM0.13m | 3:00PM0.02m | 3:59AM0.22m | ||||||||||||||||||
 | |  | |  | | | | | | | | | | | | | | | | | | | | |
 | 5:05 | — | — | — | — | — | 5:07 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:09 | — |
 | — | — | — | 9:58 | — | — | — | — | — | — | — | 9:57 | — | — | — | — | — | — | — | 9:55 | — | — | — | 9:53 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 21 | 23 | 22 | 21 | 20 | 19 | 18 | 20 | 21 | 21 | 20 | 17 | 15 | 14 | 13 | 13 | 14 | 14 | 14 | 13 | 13 | 12 | 12 |
Feels °C | 17 | 20 | 23 | 22 | 22 | 21 | 19 | 18 | 21 | 20 | 20 | 19 | 16 | 13 | 12 | 10 | 10 | 10 | 10 | 10 | 8 | 9 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | — | NW 9 | W 9 | NW 7 | NW 7 | W 7 | W 6 | W 7 | W 7 | NW 11 | NW 11 | NW 10 | NW 12 | NW 11 | NNW 4 | N 5 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NNE 7 | NW 8 |
| kJ | — | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 5 | 5 | 4 | 21 | 19 | 5 | 11 | 17 | 16 | 15 | 23 | 19 | 19 | 73 | 11 |
Swell 2 Height (m) Direction Period (s) | W 9 | W 9 | NW 6 | W 9 | W 10 | — | W 10 | W 9 | W 9 | W 9 | W 6 | NW 13 | — | W 9 | NW 11 | NW 11 | — | — | — | WNW 10 | — | — | NW 8 | — |
| kJ | 2 | 2 | 1 | 2 | 2 | — | 2 | 2 | 2 | 2 | 1 | 6 | — | 2 | 19 | 18 | — | — | — | 10 | — | — | 17 | — |
Swell 3 Height (m) Direction Period (s) | NW 6 | — | — | W 7 | — | W 10 | — | — | — | W 7 | — | W 6 | — | — | W 9 | — | — | — | — | — | — | — | — | — |
| kJ | 1 | — | — | 1 | — | 2 | — | — | — | 1 | — | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | E 3 | — | — | — | — | — | — | — | — | — | — | NNW 3 | — | — | NNW 5 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | N 6 | NNW 6 | NNW 6 |
| kJ | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 26 | 55 | 77 | 115 | 143 | 166 | 100 | 134 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 91 | 145 | 251 | 251 | 91 | 251 | 251 | 251 | 251 | 97 | 144 | 144 | 97 | 97 | 97 | 97 | 349 | 398 | 1263 | 1263 | 292 | 251 | 71 | 251 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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