Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 am 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.7°C
1.7° 

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 (10 Sep):

  • Morning surf: Morning surf (10 Sep, local time) - 1.5ft (0.4m), 7s period with NW swell.
  • Afternoon surf: Afternoon surf (10 Sep, local time) - 1.5ft (0.4m), 11s period with WNW swell.
  • Evening surf: Evening surf (10 Sep, local time) - 1.5ft (0.5m), 8s period with WNW swell.

The current surf forecast for Castlerock at 5AM is: 0.4m 7s primary swell from a Northwest direction and 0.3m 8s secondary swell from a West-northwest direction (forecast issued at 12:00am September 10). The wind direction is predicted to be cross-offshore.

Time (BST) & DateWave HeightWave Period
Morning (10 Sep)1.5ft (0.4m)7s
Afternoon (10 Sep)1.5ft (0.4m)11s
Evening (10 Sep)1.5ft (0.5m)8s

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


Short Range Forecast

Moderate rain (total 12mm), heaviest on Fri night. Very mild (max 17°C on Thu afternoon, min 12°C on Wed night). Mainly fresh winds.

Thursday
10
Friday
11
Saturday
12
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
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
1
2
2
0
1
2
2
0
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
NW
8
0.4
NW
7
0.4
WNW
7
0.3
WNW
8
0.3
WNW
9
0.4
WNW
11
0.5
WNW
12
0.5
WNW
8
0.3
WNW
12
0.9
WNW
6
0.9
NW
7
1
NW
8
1
NW
8
0.9
NW
9
0.7
NW
12
1.3
NW
12
1.1
NW
11
1.3
NW
13
1.4
NW
13
1.4
NW
13
1.5
NW
13
1.5
NW
13
1.4
NW
12
1.4
NW
12
Wave Graph
Metric surfscale
Energy kJ
28
14
21
11
15
40
77
38
31
58
63
132
135
123
138
435
268
609
649
629
688
688
574
555
Wind (km/h)
20
SSE
20
SSE
30
SSE
30
S
25
SSW
20
WSW
25
WSW
25
WSW
25
W
25
W
20
W
20
W
10
W
10
S
15
S
20
S
35
S
35
SSW
25
SSW
20
WSW
15
NW
20
NW
15
NW
15
WNW
Wind State
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross
cross
off
off
off
off
cross-off
cross-off
cross-off
cross-on
cross-on
cross-on
cross
High Tide
6:13AM1.60m
6:36PM2.05m
6:48AM1.67m
7:11PM2.08m
7:21AM1.71m
7:44PM2.04m
Low Tide
00:37AM0.11m
12:25PM0.03m
1:11AM0.05m
12:59PM-0.04m
1:42AM0.04m
1:33PM-0.05m
cloud
cloud
cloud
light rain
light rain
cloud
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
light rain
rain showers
light rain
rain showers
cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:50
6:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:58
7:54
7:52
 mm
1
1
4
2
1
3
Temp °C
12
12
13
13
15
17
16
14
14
12
13
14
15
16
16
14
14
15
16
16
14
14
14
12
Feels °C
8
8
7
8
11
14
12
10
9
7
9
10
12
14
13
10
7
9
13
14
11
11
11
10
  • 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 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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