Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 pm 12 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.4° C
0.9° 

Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Castlerock today (12 Aug):

  • Morning surf: Morning surf (12 Aug, local time) - 0.5ft (0.2m), 11s period with W swell.
  • Afternoon surf: Afternoon surf (12 Aug, local time) - 0.5ft (0.1m), 11s period with W swell.
  • Evening surf: Evening surf (12 Aug, local time) - 0.5ft (0.1m), 10s period with W swell.

The current surf forecast for Castlerock at 8PM is: 0.1m 10s primary swell from a West direction (forecast issued at 12:00pm August 12). The wind direction is predicted to be cross-offshore.

Time (BST) & DateWave HeightWave Period
Morning (12 Aug)0.5ft (0.2m)11s
Afternoon (12 Aug)0.5ft (0.1m)11s
Evening (12 Aug)0.5ft (0.1m)10s

Table - waves today at Castlerock. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 5mm), mostly falling on Thu afternoon. Warm (max 24°C on Wed afternoon, min 13°C on Fri night). Wind will be generally light.

Wed
12
Thursday
13
Friday
14
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
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.1
W
11
0.1
W
11
0.1
W
10
0.1
W
10
0.1
W
10
0.2
W
12
0.2
WNW
11
0.2
WNW
11
0.2
WNW
11
0.2
WNW
11
0.2
WNW
10
0.2
WNW
10
0.2
WNW
10
0.2
WNW
10
0.2
W
10
0.2
W
10
0.2
W
9
0.4
NW
3
0.5
NW
3
0.4
NW
4
0.4
NW
4
Wave Graph
Metric surfscale
Energy kJ
2
2
2
2
2
11
12
12
11
11
10
10
10
10
8
7
7
2
5
5
6
Wind (km/h)
15
S
15
S
15
S
10
SSE
5
S
5
SW
0
S
0
SE
5
SSE
10
WSW
5
SSE
5
W
10
NW
10
NW
15
NW
15
WNW
15
WNW
20
NW
20
WNW
20
WNW
20
NW
Wind State
off
off
off
off
glassy
glassy
glassy
glassy
glassy
cross-off
off
glassy
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
High Tide
6:54PM2.02m
7:08AM1.65m
7:34PM2.10m
7:45AM1.66m
8:12PM2.10m
Low Tide
12:44PM0.06m
1:33AM0.07m
1:22PM-0.03m
2:11AM0.06m
1:58PM-0.07m
clear
clear
cloud
cloud
cloud
cloud
cloud
part cloud
cloud
light rain
part cloud
thunderstorm
light rain
part cloud
light rain
cloud
clear
clear
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:07
9:06
9:04
 mm
1
2
1
1
Temp °C
18
22
24
23
22
19
18
18
20
21
22
22
19
18
16
15
15
15
16
15
14
Feels °C
16
20
23
23
24
21
20
20
21
22
23
24
20
19
15
13
13
11
12
12
11
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

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