Surf Forecasts:
Wavetraps surf forecast from 24 Aug 2026:
- Best quality surf: Friday 28 Aug, 9AM (local time) - 10ft (3.0m), 10s period, NNW swell with glassy winds.
- Most powerful swell: Monday 31 Aug, 3PM (local time) - 15ft (4.5m), 11s period, W swell with 4,840 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 9AM (local time) - 10ft (3.0m), 10s period with NNW swell.
Best Forecast Surf Conditions for Wavetraps this week:
The surf forecast for Wavetraps over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 28) at 9AM. The primary swell is predicted to be 3.0m and 10s period with a secondary swell of 0.7m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Wavetraps in the next 16 days are 4.5m 11s and forecast to arrive on Monday (Aug 31) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 28th Aug) | 10ft (3.0m) 10s |
| Best Surf | 9AM (Fri 28th Aug) | 10ft (3.0m) 10s |
| Most Powerful | 3PM (Mon 31st Aug) | 15ft (4.5m) 11s |
Table - best surf conditions forecast for Wavetraps over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get stuck into this one.
Alright, so the next couple of weeks are gonna be a bit of a mixed bag. We’ve got some serious size on the table, but the wind is gonna be the main character for a lot of this stretch. The standout period is shaping up to be the very end of the run, around the 5th and 6th of September. That’s where the magic is.
The first real action we see is on Monday the 24th of August. Wavetraps is pumping with a solid 13 ft swell out of the west, and the wave energy is ripping at 5953. That’s some serious grunt. But, it's blowing 9 mph from the WSW, which puts it onshore. It’s gonna be a bit of a messy one, with a cross-chop. The water temp is 55°, which is pretty average for this time of year, so no surprises there. Tuesday the 25th looks pretty grim with strong cross-onshore winds and the swell dropping.
We get a glimmer of hope on Friday the 28th of August. Early morning, the wind goes glassy – absolute zero. Dead calm. There’s a 10 ft groundswell from the NNW, with a period of 10 seconds, and the energy is a solid 2027. That’s the kind of morning you set the alarm for. This spot is a sandbar, and with that much west in the direction, it’ll be a bit unruly for beginners, but for the experienced crew, it’s going to be excellent. It’s a fairly consistent spot, and crowds are a possibility, so don't sleep in.
After a pretty rough week of onshore winds and rain, the real gem appears on Saturday the 5th of September. This is the one. Saturday morning we’ve got a 15 ft swell, clean cross-off wind from the east at 6 mph, and the energy is huge at 4041. Then, Saturday afternoon gets even better. Swell jumps to 16 ft from the west with a very long 16-second period. The energy number explodes to 12898 – that’s monstrous. With that size and a long period, you’re looking at some absolute beasts. This is a spot that’s fairly exposed, so it’s going to be handling that power. The wind stays clean and off from the east. This is not for the faint of heart – over 8 ft is firmly in expert territory. Sunday the 6th of September holds some great leftovers too, with a 12 ft clean swell from the west, but it won't have the same impact as that Saturday.
For the week prior to that, there are some spots with size, like the 15 ft on Monday the 31st of August, but the wind is just too strong and onshore for it to be any fun for a paddler. If you're into kiting, that setup might look interesting, but for a surfboard, it's a write-off.
So, to wrap it up: keep your eye on Friday the 28th of August for a sneaky glassy morning, and circle Saturday the 5th of September in big red pen for the true standout swell of the period. It looks a long way off, so there’s a bit of uncertainty, but if it comes together, it’ll be the best on offer by a long shot.
Rusty.
Short Range ForecastHeavy rain (total 92mm), heaviest during Wed night. Very mild (max 14°C on Tue morning, min 11°C on Mon morning). Winds decreasing (fresh winds from the WNW on Mon night, light winds from the NE by Wed night). | Days 4-6 Weather SummaryHeavy rain (total 102mm), heaviest during Thu morning. Very mild (max 14°C on Thu afternoon, min 10°C on Fri night). Winds decreasing (strong winds from the N on Thu night, calm by Fri night). | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
AM | 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) | W 14 | W 15 | W 15 | W 8 | W 9 | WSW 14 | W 14 | W 13 | WNW 8 | WNW 10 | WNW 9 | NW 10 | NNW 10 | NW 9 | NNW 9 | W 8 | W 20 | W 8 | WSW 9 | W 10 | W 12 |
Wave Graph | |||||||||||||||||||||
5953 | 4556 | 2864 | 881 | 1017 | 926 | 1890 | 1520 | 402 | 768 | 708 | 3461 | 1840 | 1034 | 474 | 432 | 276 | 659 | 1592 | 2206 | 3331 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-on | cross-on | on | on | on | cross-on | cross-off | cross-on | cross-on | glassy | on | glassy | cross-on | cross | cross | cross | cross-on | cross-on |
High Tide | 8:33PM2.78m | 8:55AM2.83m | 9:17PM2.94m | 9:38AM2.97m | 9:55PM3.09m | 10:15AM3.09m | 10:29PM3.22m | 10:50AM3.20m | 11:02PM3.31m | 11:23AM3.26m | 11:35PM3.37m | 11:57AM3.29m | 00:09AM3.38m | ||||||||
Low Tide | 2:23PM1.34m | 2:47AM1.26m | 3:10PM1.19m | 3:29AM1.11m | 3:49PM1.04m | 4:06AM0.95m | 4:24PM0.89m | 4:40AM0.81m | 4:56PM0.78m | 5:14AM0.69m | 5:29PM0.69m | 5:47AM0.62m | 6:02PM0.65m | ||||||||
7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:05 | — | — | 7:03 | — | — | |
— | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | |
mm | 2 | 2 | 5 | 5 | 4 | 9 | 3 | 11 | 51 | 23 | 21 | 29 | 12 | 4 | 3 | 3 | 3 | 4 | 3 | 2 | 7 |
Temp °C | 12 | 12 | 13 | 14 | 13 | 13 | 14 | 14 | 14 | 13 | 14 | 14 | 12 | 12 | 11 | 11 | 10 | 10 | 11 | 12 | 12 |
Feels °C | 9 | 9 | 9 | 9 | 8 | 10 | 12 | 10 | 11 | 9 | 9 | 8 | 12 | 9 | 9 | 8 | 7 | 4 | 9 | 7 | 8 |
Swell 1 Height (m) Direction Period (s) | W 14 | W 15 | — | WSW 14 | WSW 14 | WSW 14 | W 14 | — | WNW 8 | WNW 10 | WNW 9 | WSW 14 | NNW 10 | NW 9 | NNW 9 | NNW 8 | W 8 | W 18 | N 7 | W 16 | — |
5953 | 4556 | — | 613 | 492 | 926 | 1890 | — | 402 | 768 | 708 | 273 | 1840 | 1034 | 474 | 144 | 229 | 404 | 4 | 406 | — | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | WSW 13 | WSW 12 | W 16 | — | W 13 | W 11 | W 9 | WSW 21 | NNW 8 | WSW 13 | — | — | — |
— | — | — | — | — | — | — | — | 273 | 155 | 131 | — | 176 | 114 | 292 | 147 | 56 | 57 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 16 | W 17 | — | — | W 24 | WSW 13 | WSW 13 | WSW 12 | W 20 | N 8 | — | — | — |
— | — | — | — | — | — | — | — | 47 | 86 | — | — | 11 | 101 | 59 | 50 | 276 | 10 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | W 15 | W 8 | W 9 | W 9 | — | W 13 | — | — | N 7 | NW 10 | — | — | — | W 8 | — | W 8 | WSW 9 | W 10 | W 12 |
— | — | 2864 | 881 | 1017 | 749 | — | 1520 | — | — | 298 | 3461 | — | — | — | 432 | — | 659 | 1592 | 2206 | 3331 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 153 | 153 | 137 | 190 | 190 | 172 | 137 | 122 | 0 | 0 | 221 | 156 | 0 | 177 | 0 | 86 | 172 | 169 | 169 | 190 | 153 |
Best forecast wave conditions in West Coast South Island | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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Information about the Wavetraps Surf forecast
The above surf forecast table for Wavetraps provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Wavetraps can be found by selecting the local surf guide option on the grey menu. Our Wavetraps 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 (Wavetraps) 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 Wavetraps 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.











