Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 11 am 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
12.1°C
0.6° 

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 12 Sep 2026:

  • Best quality surf: Sunday 13 Sep, 3AM (local time) - 8ft (2.5m), 14s period, S swell with offshore winds.
  • Most powerful swell: Saturday 12 Sep, 6PM (local time) - 11ft (3.5m), 14s period, S swell with 4,467 kJ wave energy.
  • Next surfable swell (1★+): Sunday 13 Sep, 3AM (local time) - 8ft (2.5m), 14s 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 Sunday (Sep 13) at 3AM. The primary swell is predicted to be 2.5m and 14s period with a secondary swell of 0.2m and 12s. 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 3.5m 14s and forecast to arrive on Saturday (Sep 12) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Friday (Sep 18) at 12AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 13th Sep)8ft (2.5m) 14s
Best Surf 3AM (Sun 13th Sep)8ft (2.5m) 14s
Most Powerful 6PM (Sat 12th Sep)11ft (3.5m) 14s

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


The Lowdown

G’day, I’m Rusty. Let’s have a look at what’s on the cards for the next couple of weeks.

Alright, so the first few days are a bit of a mixed bag with some size coming in, but winds are going to muck it up for the most part. The standout for the whole period is shaping up to be Sunday morning, September 27, and a little earlier, Saturday morning, September 26, also offers a solid, clean option. The rest of the time, the wind just won’t play ball for clean waves.

The first proper surf window kicks off on Sunday, September 13, with a clean morning at The-Gap-Castlepoint. You’ve got a solid 7ft S swell, with a 14-second period – that’s proper groundswell. The wind is light west, cross-off, giving you clean faces. The water temp is 54°F, which is about average for this time of year, so it’s not unusual. The combined energy is 1672, which is moderate to strong, so there’s plenty of push. This is a beginner-friendly spot, but with that size and long period, it’ll be best on the point or reef to avoid it breaking too straight. Crowds are likely here, so expect company.

Come Monday morning, September 14, the swell drops to 6ft S, still a long 12-second period, and the wind goes glassy – that is a dream. The energy is 931, moderate. Clean, glassy conditions are a major positive. This is a great session for a mid-morning paddle.

Tuesday, September 15, the swell drops right off to 3ft S with a short 9-second period. Wind is cross-off and light, so it’s clean but weak. Energy is just 207, so it’s small and ordinary. From Wednesday, September 16, onwards, the swell bottoms out – 2ft, 1.0ft – with good offshore wind, but the waves are just too small to get excited about. Energy drops to 51-60. This is a gap of no real surf for 4-5 days, through to the end of that week.

Then on Saturday, September 19, the swell picks up again. Morning shows 4ft SSW swell, 15-second period, cross-off wind, and clean. Energy is 787, moderate. That’s a decent little morning session. But the afternoon gets mucked up by stronger wind.

The big one is Saturday, September 26, morning. Clean, cross-off wind, 3ft SSW swell, 10-second period, with 426 energy – not huge, but clean and fun. Then the real standout: Sunday morning, September 27. This is the best of the lot. You’ve got 8ft S swell, 10-second period, and glassy wind. Energy is a meaty 1370. That’s strong, powerful swell with zero wind. The faces will be perfect. Heads up, though – at that size, 8ft, it’s pushing into expert territory, so it’s not for beginners. The lack of wind makes it a dream. Crowds are likely at this spot, and with conditions this clean, it’ll probably be busy.

Beyond that, the tail end of the 27th afternoon and into the next week shows some size but messy wind again, so don’t get too excited. The best of the run is definitely those two mornings.

Keep your eyes on the ocean, and I’ll see you out there.

- Rusty

Short Range Forecast

Light rain (total 2mm), mostly falling on Sat morning. Very mild (max 13°C on Sun morning, min 8°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 6mm), mostly falling on Thu night. Very mild (max 16°C on Tue morning, min 8°C on Thu night). Mainly fresh winds.

Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
2
3
3
1
3
2
0
2
1
0
0
0
0
0
0
0
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)
1.4
SSW
16
3
S
14
3
S
15
2
S
14
2.5
SSW
13
2.3
S
11
1.8
S
12
1.7
S
12
1.4
S
11
0.9
S
9
0.9
S
10
0.7
S
9
0.5
S
9
0.5
S
8
0.2
SSW
14
0.3
SSW
14
0.3
SSW
13
1
S
6
0.4
SE
14
0.5
SSW
16
1.6
SSW
15
Wave Graph
Metric surfscale
Energy kJ
917
3298
3381
1599
2220
1358
926
800
442
133
149
76
38
35
18
40
32
69
57
147
1232
Wind (km/h)
15
S
15
S
20
N
10
WSW
25
SSW
5
W
5
NNW
20
NE
15
NNW
15
NW
20
NNW
30
NW
30
WNW
20
WNW
15
NW
20
NNW
15
NW
20
SSW
15
S
10
ENE
15
N
Wind State
cross-on
cross
cross-off
cross-off
cross
glassy
glassy
cross-on
cross-off
cross-off
cross-off
off
off
off
off
cross-off
off
cross
cross
cross-on
cross-off
High Tide
5:54PM1.34m
6:25AM1.30m
6:50PM1.31m
7:19AM1.32m
7:45PM1.29m
8:11AM1.34m
8:37PM1.28m
8:59AM1.34m
9:26PM1.27m
9:46AM1.32m
10:12PM1.25m
10:31AM1.30m
10:54PM1.23m
Low Tide
11:43AM-0.01m
00:17AM0.11m
12:40PM0.03m
1:11AM0.14m
1:36PM0.08m
2:01AM0.17m
2:31PM0.13m
2:50AM0.20m
3:25PM0.16m
3:37AM0.22m
4:14PM0.18m
4:23AM0.23m
5:00PM0.19m
light rain
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
cloud
cloud
rain showers
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:20
6:18
6:16
6:15
6:13
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:01
6:02
6:04
6:05
6:06
6:07
 mm
2
6
Temp °C
9
10
9
13
12
9
13
12
11
16
16
13
16
16
12
15
15
10
11
10
8
Feels °C
5
6
6
7
6
6
9
8
8
13
12
7
12
12
8
12
11
6
7
6
2
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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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