Castlepoint - The Gap Surf Break

Lat Long: 40.91° S 176.22° E

Castlepoint - The Gap Surf Forecast and Surf Report

Issued: 5 pm 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Castlepoint - The Gap sea temperature is
11.8°C
0.9° 

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 3 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 9AM (local time) - 6ft (1.9m), 7s period, S swell with offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 3AM (local time) - 7ft (2.1m), 7s period, S swell with 470 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 12AM (local time) - 3ft (0.9m), 11s 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 (Sep 04) at 12AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.1m and 10s. 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 2.1m 7s and forecast to arrive on Tuesday (Sep 08) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Friday (Sep 04) at 3PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Fri 4th Sep)3ft (0.9m) 11s
Best Surf 9AM (Tue 8th Sep)6ft (1.9m) 7s
Most Powerful 3AM (Tue 8th Sep)7ft (2.1m) 7s

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


The Lowdown

Righto, let’s have a look at what’s in store for us at Castlepoint - The Gap.

We’re in for a bit of a wait, to be honest. The first half of the forecast window is pretty average, with only a couple of small windows where you might get a half-decent wave, but nothing to get excited about. The water temp here is sitting at 53°, which is a touch cooler than average for this time of year – nothing wild, just a bit of a nip in the air.

The first real glimmer of hope comes on Tuesday the 8th of September. That morning, we’ve got a 6ft swell from the south, with a short period of 7 seconds, and a light offshore breeze from the west. The wave energy is moderate (711), and while the period is short, the offshore wind will keep things clean. It’s a beach and reef setup here, so that short period might mean a bit of a walled-up wave, but it’s the best on offer for a while. The crowd factor is listed as “often,” so you can expect some company.

After that, things drop off again until we hit a big, wild event on Sunday the 13th of September. We’re looking at a massive 15ft swell from the SSW with a period of 11 seconds. The combined energy is huge (4869), and it’s clean with cross-off winds. But honestly, this is way too big for The Gap – it’s a sheltered spot, and that kind of size will be a washing machine. This is expert-only territory, and even then, it’s a bit of a beast. Monday the 14th gets even bigger, with 23ft swells and massive energy (41190), so unless you’re a madman, stay well clear.

Now, the real standout is Tuesday the 15th of September. The morning session is the pick of the whole run. We’ve got a 8ft south swell with a nice long period of 12 seconds, light offshore winds from the west, and clean conditions. The energy is strong (2210), and while 8ft is getting up there, it’s still manageable for experienced surfers. This is a proper groundswell, so it’ll have some push and shape, but remember, that long period can make it a bit straight at a beach break – but The Gap is a point and reef setup, so it should handle it well.

Then, to round things out, Friday the 18th of September looks promising. That morning we’ve got a 3ft SSW swell with a long period of 13 seconds, gentle cross-off winds, and clean conditions. The energy is moderate (435), and it’s a nice little pulse to see the run out. The afternoon builds to 6ft with the same long period, and the energy jumps up to 1325. It’s looking very surfable.

So, if you’re picking your days, Tuesday the 15th morning is the absolute best on offer. The 18th is a solid backup. The rest is either too small, too big, or too messy. Keep an eye on that big swell mid-month – it’s more for the tow-in crew than a standard paddle.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Thu afternoon, min 10°C on Fri night). Winds decreasing (strong winds from the WNW on Fri night, light winds from the WNW by Sat morning).

Days 5-7 Weather Summary

Moderate rain (total 14mm), heaviest on Mon morning. Very mild (max 16°C on Sun afternoon, min 6°C on Tue night). Mainly strong winds.

Thu
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
0
0
0
0
1
0
1
0
0
1
0
0
2
0
0
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
S
12
0.9
S
11
0.7
S
10
0.5
S
10
0.4
SSW
9
0.4
SSW
8
0.6
SSW
8
0.9
SSW
10
0.4
SSW
17
0.6
SSW
16
0.3
SSW
17
0.7
NE
6
0.5
SSW
9
1.3
S
7
1.9
S
7
1.3
SSE
7
0.9
SE
7
1.5
S
7
1.3
S
7
0.9
S
8
Wave Graph
Metric surfscale
Energy kJ
396
191
96
45
30
26
57
155
101
203
56
37
50
163
371
161
79
214
186
102
Wind (km/h)
20
NW
25
NW
25
NNW
35
WNW
35
W
15
WNW
15
WNW
25
NW
20
NW
25
NW
20
NW
10
W
35
SW
35
SW
10
W
20
SSW
30
SSW
10
WSW
10
NE
30
NW
Wind State
off
off
cross-off
off
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross
cross
cross-off
cross-on
off
High Tide
10:15PM1.30m
10:31AM1.42m
11:03PM1.32m
11:23AM1.45m
11:52PM1.32m
12:17PM1.46m
00:45AM1.30m
1:11PM1.46m
1:41AM1.28m
2:07PM1.45m
2:39AM1.26m
3:03PM1.43m
Low Tide
4:10PM0.07m
4:30AM0.08m
5:01PM0.03m
5:19AM0.03m
5:51PM-0.02m
6:07AM-0.01m
6:40PM-0.05m
6:56AM-0.05m
7:30PM-0.06m
7:48AM-0.07m
8:22PM-0.05m
8:45AM-0.07m
9:18PM-0.01m
clear
part cloud
cloud
clear
clear
clear
part cloud
clear
part cloud
part cloud
rain showers
light rain
cloud
light rain
part cloud
light rain
rain showers
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
6:33
6:31
6:30
6:28
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:53
5:54
5:55
5:57
5:58
 mm
1
4
5
2
2
Temp °C
17
15
15
16
12
15
15
13
14
16
15
12
11
9
11
10
9
10
11
12
Feels °C
13
10
10
8
3
12
11
7
7
11
12
10
4
1
9
5
3
7
7
6
  • 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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