Surf Forecasts:
Castlepoint - The Gap surf forecast from 13 Sep 2026:
- Best quality surf: Monday 14 Sep, 12AM (local time) - 7.5ft (2.3m), 12s period, S swell with offshore winds.
- Most powerful swell: Sunday 20 Sep, 9AM (local time) - 13ft (4.0m), 12s period, SSW swell with 4,761 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 12AM (local time) - 7.5ft (2.3m), 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 Monday (Sep 14) at 12AM. The primary swell is predicted to be 2.3m and 12s 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 4.0m 12s and forecast to arrive on Sunday (Sep 20) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Friday (Sep 18) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 14th Sep) | 7.5ft (2.3m) 12s |
| Best Surf | 12AM (Mon 14th Sep) | 7.5ft (2.3m) 12s |
| Most Powerful | 9AM (Sun 20th Sep) | 13ft (4.0m) 12s |
Table - best surf conditions forecast for Castlepoint - The Gap over the next 16 days.
The Lowdown
Alright, let's break it down. The outlook for The Gap at Castlepoint starts off slow, but there's a couple of windows that'll get your heart pumping.
Right now, Sunday the 13th, you've got a 7ft south swell but it's getting trashed by a 15 mph south cross-wind. The energy's high at 1372, but the conditions are poor. Water temp is 54°, about normal for this time of year.
Monday the 14th morning is the first real gem. Swell drops to 6ft from the south, period at 12 seconds, and glassy conditions with a light 3 mph NNW breeze. Energy's still strong at 1088. This is clean, well-shaped, and the best bet early on.
Monday afternoon and Tuesday go downhill. Wind swings, swell fades, and by Tuesday afternoon it's choppy. Wednesday the 16th has a tiny 2ft SSE swell with offshore wind but energy's weak at 76 – not worth it.
Thursday the 17th morning has a 1ft SSW swell with a long 15-second period, energy at 141, clean. Long period means better shape but it's small.
Friday the 18th morning is glassy again with a 3ft SE swell, 13-second period, energy at 333. Fun on a log.
Now the big one: Wednesday the 23rd morning. You're looking at an 12ft SSW swell, 10-second period, energy at 4062, and clean offshore WNW wind at 15 mph. That's big, powerful, and only for experienced surfers. The Gap is sheltered, so it'll be pumping. Over 8ft, this is expert country.
Saturday the 19th has a 3ft SSW swell with 14-15 second periods, clean offshore winds, energy around 493-496. That's a nice long-period groundswell – perfect for the reef.
Sunday the 20th gets huge again – 13ft SSW swell – but cross-winds mess it up. Energy hits 6754 in the afternoon, but the wind kills it.
Tuesday the 22nd has an 12ft SSW swell with clean cross-offshore wind, energy at 3707, but short 10-second period. Chunky.
The second week fades. Thursday the 24th has 6ft south swell but strong cross-winds – messy. Friday the 25th has clean conditions with a 3ft SSW swell, 15-second period, light winds – good for a longboard. After that, it's small and clean but weak, with energy dropping below 200 by Saturday the 26th.
Best bets: Monday the 14th morning for clean, solid south swell, and Wednesday the 23rd morning for the big, offshore, expert-level SSW swell.
Rusty
Short Range ForecastMostly dry. Very mild (max 17°C on Tue afternoon, min 8°C on Sun night). Winds increasing (calm on Mon morning, fresh winds from the WNW by Tue night). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Fri night. Very mild (max 15°C on Wed afternoon, min 10°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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) | S 13 | S 12 | S 12 | S 12 | S 11 | S 10 | S 9 | SSE 8 | SSE 9 | SE 11 | SE 11 | SSW 15 | ESE 10 | SE 15 | SE 13 | SE 12 | SSW 7 | SSW 14 | SSW 15 | SSW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1355 | 1544 | 1083 | 805 | 515 | 221 | 203 | 62 | 49 | 24 | 34 | 72 | 61 | 55 | 238 | 205 | 198 | 297 | 381 | 1211 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | glassy | cross-on | cross-off | cross-off | cross | cross-off | off | off | off | cross-off | cross | glassy | glassy | off | off | off | cross-off | cross-off |
High Tide | 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 | 11:15AM1.27m | 11:35PM1.19m | |||||||
Low Tide | 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 | 5:06AM0.23m | 5:43PM0.18m | ||||||||
 |  | | | | | |  | | | |  |  |  | |  |  | | | | |
 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — |
 | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 9 | — | — | — |
Temp °C | 11 | 9 | 13 | 12 | 10 | 15 | 17 | 12 | 15 | 15 | 12 | 15 | 14 | 12 | 12 | 11 | 11 | 15 | 15 | 13 |
Feels °C | 5 | 6 | 10 | 8 | 7 | 12 | 13 | 6 | 10 | 10 | 6 | 12 | 10 | 9 | 11 | 9 | 8 | 10 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | ENE 12 | S 12 | S 12 | S 12 | S 11 | S 10 | S 9 | SSE 8 | SSE 9 | SE 8 | SE 10 | ESE 10 | ESE 10 | SE 9 | SE 13 | SE 12 | SE 11 | SSW 6 | SSW 15 | ESE 11 |
| kJ | 14 | 1544 | 1083 | 805 | 515 | 221 | 203 | 62 | 49 | 24 | 34 | 68 | 60 | 21 | 238 | 205 | 150 | 66 | 381 | 84 |
Swell 2 Height (m) Direction Period (s) | NE 9 | ENE 12 | NE 12 | NE 11 | NE 13 | SSW 11 | SSW 14 | S 9 | SSW 8 | S 8 | SE 11 | SSW 15 | SSW 14 | SE 15 | ENE 7 | NE 7 | SSW 16 | SSW 14 | SE 11 | SSW 19 |
| kJ | 3 | 14 | 5 | 5 | 7 | 91 | 41 | 39 | 23 | 12 | 33 | 72 | 61 | 55 | 73 | 38 | 191 | 297 | 99 | 119 |
Swell 3 Height (m) Direction Period (s) | — | SE 10 | — | — | E 11 | E 10 | NE 13 | NE 4 | NE 5 | SE 11 | S 8 | S 8 | NE 12 | SSW 12 | SSW 11 | SSW 6 | NE 9 | SE 11 | S 6 | NE 11 |
| kJ | — | 4 | — | — | 2 | 2 | 7 | 4 | 4 | 18 | 5 | 1 | 5 | 29 | 22 | 13 | 40 | 130 | 16 | 18 |
Wind waves Height (m) Direction Period (s) | S 13 | — | — | — | NNE 3 | N 3 | NE 2 | NW 3 | NW 3 | NW 3 | NW 3 | NNW 2 | NE 4 | ENE 5 | — | NW 3 | SSW 7 | WNW 4 | W 3 | SSW 8 |
| kJ | 1355 | — | — | — | 3 | 1 | 1 | 2 | 1 | 2 | 2 | 1 | 9 | 19 | — | 5 | 198 | 9 | 5 | 1211 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 99 | 0 | 0 | 96 | 0 | 0 | 28 | 28 | 16 | 4 | 1 | 0 | 55 | 0 | 0 | 0 | 0 | 0 | 0 | 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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