Surf Forecasts:
Castlepoint - The Gap surf forecast from 25 Aug 2026:
- Best quality surf: Friday 28 Aug, 3AM (local time) - 5.5ft (1.7m), 13s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 6AM (local time) - 13ft (4.0m), 10s period, S swell with 3,092 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 12PM (local time) - 3ft (0.9m), 15s period with SSW 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 Wednesday (Aug 26) at 12PM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.2m and 13s. 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 4.0m 10s and forecast to arrive on Monday (Aug 31) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Aug 30) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Wed 26th Aug) | 3ft (0.9m) 15s |
| Best Surf | 3AM (Fri 28th Aug) | 5.5ft (1.7m) 13s |
| Most Powerful | 6AM (Mon 31st Aug) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Castlepoint - The Gap over the next 16 days.
The Lowdown
Alright, crew, let’s have a look at what’s coming up for Castlepoint - The Gap. The next 16 days have a bit of a stop-start feel to it. We’ve got a solid opening, then a few messy days with some bigger, wind-affected swell, before a couple of clean windows worth getting excited about.
The first real standout is Tuesday afternoon, August 25th. We’ve got a clean 4ft SSW groundswell rolling in with a long 16-second period, and the wind is light offshore from the WNW at 12 mph. That’s proper clean, lined-up surf for the beginner-friendly setup here. Combined swell energy is moderate at 772. The water’s sitting at 53°F, which is pretty average for this time of year.
Things go a bit quiet and small after that. Wednesday the 26th stays clean with offshore winds, but the swell drops to 3ft or less, so it’s marginal. Then Thursday and Friday the 27th and 28th see a pulse of S swell pushing up to 7ft, but the wind swings cross-on and cross-off, making it choppy and less appealing. That bigger energy on Thursday afternoon hits 2401 – strong – but the wind just kills the quality.
We hit a flat spell from Saturday the 29th through most of the following week. Tiny waves, clean but barely rideable, and by Monday the 31st a 13ft S swell arrives but it’s howling cross-shore at 22 mph. That’s messy, lumpy, and honestly more of a kite-surfing setup than a paddle session.
Now, for the real highlight: Tuesday morning, September 1st. The wind is light offshore from the WNW at 9 mph, and we’ve got a clean 5ft groundswell from the south with a 12-second period. It’s clean, it’s lined up, and combined energy is a moderate 696. This is your best bet for a proper session – get in the water.
The following days see more wind issues. Wednesday September 2nd has a 5ft SSW swell but a near-gale offshore at 34 mph, making it almost impossible to paddle into. Thursday the 3rd morning is glassy but tiny at 2ft, so it’s more of a longboard or cruise session. Then Friday the 4th through the 6th stays small and mostly messy.
Finally, Monday September 7th brings another solid pulse: a 7ft S swell with a short 8-second period, but with a moderate offshore from the NW at 16 mph. That’s clean and punchy, but at over 7ft, it’s really for experienced surfers only. Combined energy is 681. The short period means it’ll be a bit walled-off at the beach, but The Gap can handle it.
Overall, the standout windows are Tuesday afternoon August 25th and Tuesday morning September 1st. The long-range stuff on September 7th is promising but less certain. Don’t hold your breath for the flat spells – it’s a typical pattern for the area, and forecasts can change.
Stay stoked,
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Wed night. Very mild (max 16°C on Fri morning, min 9°C on Wed night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Very mild (max 16°C on Fri afternoon, min 7°C on Sun night). Winds increasing (light winds from the NNW on Sat morning, strong winds from the SSW by Sun night). | |||||||||||||||||||
Tue 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
PM | 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) | SSW 16 | SSW 15 | SSW 16 | SSW 15 | SSW 17 | S 17 | S 16 | S 14 | S 12 | S 12 | S 11 | SSE 11 | S 11 | S 11 | ENE 8 | NE 8 | S 9 | S 10 | S 10 | S 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 754 | 413 | 554 | 376 | 737 | 2121 | 2389 | 1243 | 692 | 420 | 205 | 170 | 151 | 82 | 82 | 54 | 2300 | 3000 | 1737 | 1914 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross | cross-on | cross-on | cross | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | off |
High Tide | 3:09AM1.08m | 3:24PM1.20m | 3:54AM1.07m | 4:09PM1.18m | 4:41AM1.07m | 4:57PM1.18m | 5:30AM1.08m | 5:49PM1.18m | 6:21AM1.12m | 6:43PM1.19m | 7:12AM1.17m | 7:39PM1.22m | ||||||||
Low Tide | 9:01PM0.22m | 9:06AM0.23m | 9:45PM0.23m | 9:53AM0.22m | 10:35PM0.24m | 10:43AM0.21m | 11:30PM0.24m | 11:34AM0.20m | 00:25AM0.24m | 12:28PM0.19m | 1:16AM0.22m | 1:23PM0.17m | 2:05AM0.20m | |||||||
 |  |  | |  | | |  | |  | | | | | |  | | | | | |
 | — | — | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — |
 | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — |
mm | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — |
Temp °C | 15 | 12 | 15 | 15 | 15 | 9 | 10 | 11 | 16 | 16 | 13 | 15 | 16 | 11 | 13 | 11 | 9 | 9 | 9 | 6 |
Feels °C | 11 | 6 | 11 | 10 | 8 | 6 | 5 | 8 | 12 | 10 | 8 | 13 | 13 | 7 | 8 | 5 | -1 | 1 | 1 | 2 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 16 | SSW 15 | SSW 17 | S 17 | S 16 | S 14 | S 12 | S 12 | S 11 | SSE 11 | S 11 | S 11 | ENE 8 | NE 8 | NE 9 | NE 9 | S 16 | S 14 |
| kJ | 754 | 413 | 554 | 376 | 737 | 2121 | 2389 | 1243 | 692 | 420 | 205 | 170 | 151 | 82 | 82 | 54 | 19 | 14 | 643 | 1914 |
Swell 2 Height (m) Direction Period (s) | ESE 13 | SSW 19 | ESE 13 | ESE 13 | ESE 12 | S 7 | ESE 11 | — | NE 6 | ENE 7 | NE 7 | NE 7 | ENE 7 | ENE 6 | SSW 9 | SSW 8 | NE 7 | — | NE 9 | ENE 8 |
| kJ | 17 | 115 | 17 | 17 | 15 | 135 | 12 | — | 34 | 83 | 50 | 37 | 30 | 26 | 29 | 13 | 12 | — | 14 | 7 |
Swell 3 Height (m) Direction Period (s) | NE 5 | ESE 12 | N 5 | E 10 | E 10 | ESE 11 | — | — | SE 15 | SE 15 | SSE 15 | SSW 11 | SE 12 | SSW 13 | SSE 10 | SSE 10 | — | — | — | — |
| kJ | 1 | 15 | 2 | 2 | 2 | 13 | — | — | 9 | 9 | 21 | 25 | 24 | 58 | 33 | 18 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 4 | WNW 3 | NW 3 | WNW 3 | W 4 | — | — | NE 5 | NE 6 | NNW 2 | NW 3 | — | NE 6 | — | NW 3 | WSW 4 | S 9 | S 10 | S 10 | — |
| kJ | 16 | 3 | 9 | 7 | 9 | — | — | 37 | 102 | 1 | 2 | — | 60 | — | 8 | 5 | 2300 | 3000 | 1737 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 16 | 16 | 74 | 192 | 99 | 102 | 88 | 28 | 28 | 16 | 0 | 0 | 25 | 28 | 66 | 296 | 235 | 99 | 0 |
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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