Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 11 am 20 Jul 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
12.9° C
0.1° 

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 20 Jul 2026:

  • Best quality surf: Sunday 26 Jul, 6PM (local time) - 15ft (4.5m), 11s period, S swell with cross-offshore winds.
  • Most powerful swell: Sunday 26 Jul, 9PM (local time) - 15ft (4.5m), 11s period, S swell with 4,477 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 21 Jul, 12AM (local time) - 8ft (2.5m), 17s 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 Tuesday (Jul 21) at 12AM. The primary swell is predicted to be 2.5m and 17s period with a secondary swell of 0.7m and 11s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Castlepoint - The Gap in the next 16 days are 4.5m 11s and forecast to arrive on Sunday (Jul 26) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 9s period and expected on Sunday (Jul 26) at 12AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Tue 21st Jul)8ft (2.5m) 17s
Best Surf 6PM (Sun 26th Jul)15ft (4.5m) 11s
Most Powerful 9PM (Sun 26th Jul)15ft (4.5m) 11s

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


The Lowdown

Alright, Rusty here. Let's size up the local breaks for the next couple of weeks. There's a bit of a mixed bag, but a few solid windows are on the cards.

The main action starts to kick up around Monday the 20th. We get a serious pulse of groundswell at Castlepoint - The Gap. Monday morning you're looking at clean, 7ft surf with a long 15-second period. The combined swell energy is a solid 2086, so plenty there. The water temp is around 55°, which is pretty average for this time of year, so no surprises. The wind is light cross-off, making for some nice shape. This is one for the experienced crew at this size, and you can expect crowds to be a factor. The south swell direction works a treat for this sheltered spot.

That good energy sticks around through Tuesday the 21st with similar 7ft to 6ft south swell, still clean with light cross-off winds. Still a bit heavy for beginners, but there's plenty of power.

For the standout of the period, I'm calling out Thursday morning, the 30th of July. After a few days of messy, strong winds and a lot of big, blown-out swell, things clean up perfectly. The wind goes glassy, dead calm, and we get a 7ft south groundswell with a solid 14-second period. The combined energy is pumping at 2336. This is a true jewel – glassy conditions with a clean, powerful swell will set the stage for some epic barrels for the experienced surfers. This is the morning to be in the water.

Also worth a look on Monday, the 27th of July. There's a massive swell building, pushing up to about 10ft and even 15ft, but the wind is howling from the south-west for most of it. That'll make a mess of things, but by Monday afternoon the wind swings cross-off and the swell settles to a more manageable 8ft from the south-east with a 12-second period. The energy is massive at 2857. It'll be a raw, challenging session, but for the experts who don't mind a war, there could be some freight train sets.

After that first week of action, the second week turns pretty quiet and ordinary. From Thursday the 31st into the first week of August, the swell drops right off to around 3ft or less, and we get hammered by strong south-west winds most days, making it garbage for paddling. From the 1st of August onwards, it's basically flat and weak with howling winds. You'd be better off leaving the board in the car.

So overall, get in for the solid, clean groundswell on Monday the 20th through Tuesday the 21st, and definitely mark your calendar for that glassy Thursday, the 30th of July. That's the pick of the month.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 11°C on Tue afternoon, min 7°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 11mm), heaviest on Sat night. Very mild (max 14°C on Fri morning, min 6°C on Sat night). Mainly strong winds.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
4
3
3
2
1
1
1
1
0
0
0
0
0
0
1
0
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
S
15
2.5
S
19
2.5
S
17
2
S
15
1.8
S
14
1.4
S
13
0.9
SSW
12
1.1
S
12
0.7
SSW
12
0.5
SSW
12
0.4
SSW
11
0.3
SSE
10
0.3
S
9
0.6
NNE
5
0.5
NE
6
1.3
SSW
8
1.2
SSW
8
0.5
SE
15
4.5
S
11
4.5
S
11
4
S
11
Wave Graph
Metric surfscale
Energy kJ
1959
5224
3426
1733
1207
633
263
350
138
83
49
19
15
15
21
196
197
112
4104
4366
3499
Wind (km/h)
10
SW
15
SSE
5
SSE
10
NW
10
NNW
20
NW
10
W
5
SSE
5
NW
10
NNW
20
NNW
25
NNW
25
N
25
N
25
NW
30
SW
10
WNW
30
WNW
55
S
45
SSW
30
WSW
Wind State
cross-off
cross-on
glassy
cross-off
cross-off
off
off
cross-on
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
off
off
cross
cross
cross-off
High Tide
9:55AM1.36m
10:23PM1.36m
10:46AM1.36m
11:13PM1.33m
11:36AM1.35m
00:01AM1.29m
12:26PM1.33m
00:46AM1.26m
1:14PM1.32m
1:32AM1.22m
1:59PM1.30m
2:19AM1.18m
2:41PM1.29m
Low Tide
4:14PM0.01m
4:42AM0.05m
5:08PM0.07m
5:30AM0.10m
6:00PM0.13m
6:15AM0.15m
6:48PM0.18m
6:58AM0.21m
7:34PM0.22m
7:39AM0.25m
8:18PM0.25m
8:21AM0.28m
9:02PM0.27m
part cloud
cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
cloud
rain showers
clear
cloud
rain showers
mod rain
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:33
7:31
7:31
7:30
7:30
7:28
7:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:09
5:10
5:10
5:12
5:13
5:14
5:15
 mm
2
9
7
1
1
Temp °C
10
10
10
9
11
9
11
11
9
12
13
12
14
14
11
9
10
8
8
8
6
Feels °C
6
6
7
5
7
5
9
9
8
7
8
7
9
9
6
4
6
2
-3
-2
-4
  • Map Icons:
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  • 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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