Surf Forecasts:
Castlepoint - The Gap surf forecast from 30 Aug 2026:
- Best quality surf: Tuesday 1 Sep, 3AM (local time) - 15ft (4.5m), 12s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 3PM (local time) - 16ft (5.0m), 13s period, SSW swell with 8,386 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 12AM (local time) - 10ft (3.0m), 12s 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 (Sep 01) at 12AM. The primary swell is predicted to be 3.0m and 12s period with a secondary swell of 0.3m and 9s. 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 5.0m 13s and forecast to arrive on Tuesday (Sep 01) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Monday (Sep 07) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Tue 1st Sep) | 10ft (3.0m) 12s |
| Best Surf | 3AM (Tue 1st Sep) | 15ft (4.5m) 12s |
| Most Powerful | 3PM (Tue 1st Sep) | 16ft (5.0m) 13s |
Table - best surf conditions forecast for Castlepoint - The Gap over the next 16 days.
The Lowdown
Alright, Rusty here, giving you the straight-up on your local surf for the next couple of weeks. It’s a bit of a rollercoaster, so hang tight.
Water temp is about what you’d expect for this time of year, nothing crazy. The whole forecast kicks off with a big gap before the main event. The only real standout is on Tuesday, 1st September.
Monday, 31st August is a total washout. Swell is 6ft from the SSW, period 14 seconds, but the wind is howling at 25 mph from the WNW. It’s offshore, so clean, but the energy is massive at 1537 and it’s a nightmare to get into. Just skip it.
Tuesday, 1st September is the big one. The swell jumps to 15ft in the morning from the SSW, period 11 seconds, with energy at 7955. It’s clean with a moderate offshore breeze. By the afternoon, it’s even bigger at 16ft from the SSW, period 13 seconds, energy hitting 12642. This is powerful, groundswell energy. But here’s the rub: Castlepoint - The Gap is a sheltered spot, and that’s just too much swell. It’s for experts only. The wind goes light and cross-shore in the afternoon, so it’s clean but heavy. Not for the faint of heart.
Wednesday, 2nd September is still solid but dropping. Morning sees 8ft from the S, period 14 seconds, energy 2891, with a moderate offshore. Afternoon is 8ft from the S, 15-second period, energy 2782, with a fresh offshore. Clean but still powerful.
After that, it drops off hard. Thursday, 3rd September is down to 4ft, then 3ft, and the energy is low. From Friday, 4th September through Monday, 7th September, it’s barely a ripple. Swell under 3ft, energy often under 100, just poor.
Tuesday, 8th September offers a little something. The morning has 5ft from the SSW, period 11 seconds, energy 597, and it’s clean with a light breeze. That’s a small, workable window for a beginner-to-intermediate wave. The afternoon turns messy again.
The rest of the second week is a mix of tiny waves and poor conditions. Wednesday, 9th September is ordinary, and Thursday, 10th September is a write-off with strong winds. Friday, 11th September stays tiny but clean. Saturday, 12th September sees another spike to 10ft from the SSW, but it’s cross-onshore and choppy—ugly. Sunday, 13th September returns to 8ft from the S, clean and offshore, so that’s a decent option for the experienced crew. Monday, 14th September and Tuesday, 15th September are back to small, clean, and marginal.
Bottom line: The only true standout is Tuesday, 1st September, but it’s a beast for experts only. For beginners, aim for Tuesday, 8th September morning, or Sunday, 13th September for a cleaner, smaller session. The rest is a waiting game.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Mon night. Very mild (max 15°C on Mon morning, min 5°C on Mon night). Winds decreasing (strong winds from the WNW on Mon morning, light winds from the NW by Tue afternoon). | Days 5-7 Weather SummarySome drizzle, heaviest during Thu night. Very mild (max 17°C on Thu morning, min 10°C on Fri night). Winds decreasing (strong winds from the WNW on Wed night, light winds from the WNW by Sat morning). | ||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | S 17 | SSW 14 | SSW 13 | S 12 | SSW 11 | SSW 13 | S 13 | S 14 | S 15 | S 13 | S 12 | S 12 | S 11 | S 10 | SSW 16 | SSW 8 | SSW 8 | SSW 8 | SSW 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 149 | 1512 | 1408 | 2958 | 5020 | 8386 | 3082 | 2147 | 2753 | 1264 | 432 | 266 | 112 | 48 | 25 | 28 | 75 | 51 | 80 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | cross-off | cross | off | off | off | off | off | off | cross-off | off | off | off | off | off | cross-off |
High Tide | 7:12AM1.17m | 7:39PM1.22m | 8:03AM1.24m | 8:33PM1.24m | 8:53AM1.31m | 9:25PM1.28m | 9:42AM1.37m | 10:15PM1.30m | 10:31AM1.42m | 11:03PM1.32m | 11:23AM1.45m | 11:52PM1.32m | |||||||
Low Tide | 1:16AM0.22m | 1:23PM0.17m | 2:05AM0.20m | 2:21PM0.15m | 2:54AM0.17m | 3:17PM0.12m | 3:42AM0.13m | 4:10PM0.07m | 4:30AM0.08m | 5:01PM0.03m | 5:19AM0.03m | 5:51PM-0.02m | |||||||
 |  |  |  | | | | | |  | | |  | | | | | | | |
 | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — |
 | — | — | 5:49 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — |
mm | — | — | — | 7 | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 14 | 15 | 14 | 6 | 10 | 11 | 10 | 15 | 15 | 14 | 17 | 17 | 16 | 17 | 16 | 13 | 15 | 15 | 12 |
Feels °C | 5 | 7 | 5 | 1 | 3 | 7 | 4 | 9 | 8 | 8 | 12 | 12 | 11 | 12 | 10 | 7 | 11 | 10 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 14 | SSW 13 | S 12 | SSW 12 | S 13 | S 13 | S 14 | S 15 | S 13 | S 12 | S 12 | S 11 | S 10 | NE 6 | SSW 8 | SSW 8 | SSW 8 | SSW 10 |
| kJ | 94 | 1512 | 1408 | 2958 | 2920 | 4244 | 3082 | 2147 | 2753 | 1264 | 432 | 266 | 112 | 48 | 14 | 28 | 75 | 51 | 80 |
Swell 2 Height (m) Direction Period (s) | S 17 | NE 9 | NE 9 | NE 9 | ENE 9 | ENE 11 | ENE 10 | S 18 | NE 9 | SW 5 | NE 10 | NE 10 | NE 10 | SSW 14 | SSW 10 | NE 7 | SSW 14 | SSW 14 | NE 10 |
| kJ | 149 | 20 | 13 | 12 | 8 | 12 | 10 | 735 | 14 | 1 | 4 | 4 | 4 | 20 | 18 | 12 | 21 | 36 | 4 |
Swell 3 Height (m) Direction Period (s) | NE 8 | SE 11 | SE 11 | — | SE 13 | — | — | ENE 10 | SE 12 | NE 10 | — | NE 5 | SE 11 | NE 5 | SSW 16 | SSW 15 | NE 8 | NE 10 | SE 9 |
| kJ | 10 | 5 | 5 | — | 7 | — | — | 9 | 6 | 4 | — | 1 | 5 | 1 | 25 | 23 | 2 | 4 | 3 |
Wind waves Height (m) Direction Period (s) | W 4 | W 4 | W 4 | — | SSW 11 | SSW 13 | NW 4 | — | NNE 10 | WNW 4 | WNW 3 | WNW 4 | NW 3 | NNW 3 | WNW 3 | W 4 | NW 4 | WNW 2 | N 3 |
| kJ | 7 | 24 | 27 | — | 5020 | 8386 | 16 | — | 9 | 10 | 10 | 11 | 9 | 8 | 9 | 13 | 3 | 1 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 25 | 143 | 185 | 0 | 76 | 1 | 0 | 1 | 16 | 135 | 16 | 74 | 192 | 1 | 143 | 4 | 0 | 0 | 28 |
Best forecast wave conditions in The Wairarapa | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
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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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