Castlerock Surf Break

Lat Long: 55.17° N 6.78° W

Castlerock 48 hour detailed Surf Forecast

Issued: 12 pm 14 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlerock sea temperature is
15.4°C
1.5° 

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 (14 Sep):

  • Morning surf: Morning surf (14 Sep, local time) - 1.5ft (0.5m), 9s period with NW swell.
  • Afternoon surf: Afternoon surf (14 Sep, local time) - 1.5ft (0.5m), 8s period with NW swell.
  • Evening surf: Evening surf (14 Sep, local time) - 1.5ft (0.5m), 10s period with WNW swell.

The current surf forecast for Castlerock at 11PM is: 0.5m 10s primary swell from a West-northwest direction and 0.2m 12s secondary swell from a North direction (forecast issued at 12:00pm September 14). The wind direction is predicted to be offshore.

Time (BST) & DateWave HeightWave Period
Morning (14 Sep)1.5ft (0.5m)9s
Afternoon (14 Sep)1.5ft (0.5m)8s
Evening (14 Sep)1.5ft (0.5m)10s

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


Short Range Forecast

Moderate rain (total 11mm), heaviest on Mon afternoon. Very mild (max 17°C on Mon morning, min 12°C on Wed night). Mainly fresh winds.

Mon
14
Tuesday
15
Wednesday
16
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
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
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)
0.5
NW
9
0.5
NW
9
0.4
WNW
8
0.5
WNW
11
0.5
WNW
10
0.5
WNW
10
0.4
WNW
9
0.4
WNW
11
0.4
WNW
10
0.4
WNW
10
0.9
NW
5
1.1
NW
5
1.1
NW
6
1.2
NW
6
1.3
NW
6
1.3
NW
7
1.3
NW
11
1.3
NW
10
1.1
NW
10
1
NW
10
0.9
NW
9
Wave Graph
Metric surfscale
Energy kJ
38
36
28
65
59
59
34
44
40
38
40
74
80
116
150
164
414
341
250
184
120
Wind (km/h)
20
S
15
S
15
S
20
S
20
S
25
WSW
20
SW
30
WSW
20
WSW
30
WNW
30
WNW
30
WNW
30
WNW
30
WNW
30
WNW
25
NW
25
WNW
20
W
20
WSW
25
SSW
30
SSW
Wind State
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-off
cross-off
cross-off
High Tide
8:23AM1.69m
8:45PM1.78m
8:53AM1.63m
9:13PM1.60m
9:24AM1.54m
9:41PM1.41m
Low Tide
2:39PM0.09m
3:04AM0.25m
3:12PM0.22m
3:29AM0.36m
3:47PM0.38m
cloud
light rain
light rain
light rain
part cloud
clear
clear
part cloud
part cloud
rain showers
rain showers
clear
clear
clear
clear
rain showers
rain showers
cloud
cloud
part cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:56
6:58
7:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:47
7:45
7:43
 mm
1
2
2
1
1
1
1
1
Temp °C
16
17
16
17
17
15
13
13
13
15
15
13
13
13
13
13
13
13
15
14
13
Feels °C
14
16
15
16
15
11
10
8
9
9
10
7
8
8
8
8
8
8
11
10
8
  • 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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