Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 11 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
11.8° C
0.8° 

Castlepoint - The Gap surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Castlepoint - The Gap surf forecast from 21 Aug 2026:

  • Best quality surf: Monday 24 Aug, 12PM (local time) - 10ft (3.0m), 14s period, SSW swell with glassy winds.
  • Most powerful swell: Monday 24 Aug, 12PM (local time) - 10ft (3.0m), 14s period, SSW swell with 3,197 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 6PM (local time) - 4.5ft (1.4m), 13s period with S swell.

Best Forecast Surf Conditions for Castlepoint - The Gap this week:

The surf forecast for Castlepoint - The Gap over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 6PM. The primary swell is predicted to be 1.4m and 13s period with a secondary swell of 0.6m and 16s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Castlepoint - The Gap in the next 16 days are 3.0m 14s and forecast to arrive on Monday (Aug 24) at 12PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 10s period and expected on Monday (Aug 24) at 6AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Fri 21st Aug)4.5ft (1.4m) 13s
Best Surf12PM (Mon 24th Aug)10ft (3.0m) 14s
Most Powerful12PM (Mon 24th Aug)10ft (3.0m) 14s

Table - best surf conditions forecast for Castlepoint - The Gap over the next 16 days.


The Lowdown

Rusty here again, same story but in feet. For the swell height, take the metric numbers and multiply by 3 to get feet. A 1.7m becomes about 6ft. A 2.3m is about 8ft. The 6.5m on September 3rd works out to about 22ft. Winds: 1 km/h is about 0.62 mph, so 5 km/h is about 3 mph, and 50 km/h is about 31 mph. Water temperatures in Fahrenheit: 12°C is about 53°F. All other guidance and details remain the same.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Sun morning. Very mild (max 14°C on Sat afternoon, min 8°C on Fri morning). Winds increasing (calm on Fri morning, near gales from the WNW by Sun morning).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 16°C on Tue afternoon, min 10°C on Mon morning). Winds increasing (calm on Mon morning, fresh winds from the WNW by Tue night).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
0
0
0
0
0
0
0
3
3
1
2
2
0
1
1
2
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
S
16
1.6
S
13
1.3
S
12
1.1
S
11
1
S
11
0.8
S
11
0.5
S
10
0.3
ESE
13
0.5
SSW
9
2.3
SSW
11
2.5
SSW
14
1.7
SSW
12
1.3
S
11
1.1
S
10
0.7
SSW
14
0.9
SSW
17
1
SSW
16
1
SSW
15
1
SSW
14
1.1
S
17
1.2
S
16
Wave Graph
Metric surfscale
Energy kJ
1384
905
480
300
233
141
50
34
45
1256
2776
833
396
259
210
510
534
487
395
692
743
Wind (km/h)
5
WNW
10
NW
25
NW
30
NW
25
WNW
30
NW
50
WNW
50
WNW
40
W
15
W
10
NNE
30
NW
20
WNW
25
WNW
35
WNW
25
WNW
30
WNW
25
WNW
30
NW
15
NW
25
NNW
Wind State
glassy
cross-off
cross-off
off
off
off
off
off
off
off
cross
off
off
off
off
off
off
off
off
cross-off
cross-off
High Tide
11:52AM1.31m
00:11AM1.22m
12:37PM1.28m
00:54AM1.18m
1:20PM1.26m
1:39AM1.14m
2:01PM1.24m
2:24AM1.10m
2:42PM1.22m
3:09AM1.08m
3:24PM1.20m
3:54AM1.07m
4:09PM1.18m
Low Tide
6:17PM0.18m
6:24AM0.22m
6:59PM0.20m
7:03AM0.24m
7:40PM0.21m
7:42AM0.24m
8:20PM0.21m
8:22AM0.24m
9:01PM0.22m
9:06AM0.23m
9:45PM0.23m
9:53AM0.22m
10:35PM0.24m
clear
clear
clear
clear
clear
part cloud
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:56
6:54
6:54
6:52
6:50
6:48
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:39
5:40
5:42
5:42
5:43
5:44
5:45
 mm
3
Temp °C
11
13
11
13
14
14
14
13
11
13
14
11
15
16
13
15
14
13
14
16
13
Feels °C
9
11
5
7
8
7
5
2
3
10
10
5
10
12
5
9
8
6
8
12
8
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Castlepoint - The Gap Surf forecast

The above surf forecast table for Castlepoint - The Gap provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castlepoint - The Gap can be found by selecting the local surf guide option on the grey menu. Our Castlepoint - The Gap surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Castlepoint - The Gap) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Castlepoint - The Gap may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a holiday in The Wairarapa? If you are looking for accommodation near Castlepoint - The Gap, camping, hotels and holiday cottages in The Wairarapa, consider staying in Masterton which is 48 km (30 miles) away. Other places in and around The Wairarapa where you can find information about places to rent, and car hire include Palmerston North which is 80 km (50 miles) away and Levin, 86 km (53 miles) away.

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