
Surf Forecasts:
Kahutara surf forecast from 12 Sep 2026:
- Best quality surf: Sunday 13 Sep, 6AM (local time) - 5.5ft (1.7m), 15s period, S swell with offshore winds.
- Most powerful swell: Sunday 13 Sep, 6AM (local time) - 5.5ft (1.7m), 15s period, S swell with 1,344 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 6AM (local time) - 5.5ft (1.7m), 15s period with S swell.
Best Forecast Surf Conditions for Kahutara this week:
The surf forecast for Kahutara over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 13) at 6AM. The primary swell is predicted to be 1.7m and 15s 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 Kahutara in the next 16 days are 1.7m 15s and forecast to arrive on Sunday (Sep 13) at 6AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Tuesday (Sep 15) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 13th Sep) | 5.5ft (1.7m) 15s |
| Best Surf | 6AM (Sun 13th Sep) | 5.5ft (1.7m) 15s |
| Most Powerful | 6AM (Sun 13th Sep) | 5.5ft (1.7m) 15s |
Table - best surf conditions forecast for Kahutara over the next 16 days.
The Lowdown
G’day, Rusty here.
Let’s break down what’s happening at Kahutara over the next couple weeks. This is a reef and point setup, so it’s got some character. Water temp is about average for this time of year, nothing crazy.
The start of the week is a bit rough. Sunday the 13th has some size—around 5ft to 6ft—but that south swell is getting cross-fired and blown onshore. The energy’s solid, hitting 1306 and 936, but the wind is just killing it. Not worth suiting up.
Monday the 14th is where we get a turn. Morning’s glassy flat calm, with a clean 5ft south swell. That’s the kind of session you dream about—smooth, no wind, just you and the ocean. Energy’s moderate at 603, but quality is high. That afternoon stays glassy too, waves easing to 4ft.
Tuesday the 15th holds clean but smaller, around 3ft in the morning, dropping to 3ft in the arvo. Glassy conditions again, but energy’s down to 223 and 199. It’s surfable, but you’ll be hunting for the fun ones.
Then we hit a flat spell. Wednesday the 16th and Thursday the 17th are pretty ordinary—tiny surf, mixed winds, energy in the 48 to 143 range. Not much happening.
Friday the 18th sees a longer-period southeast swell, 4ft with a 13-second interval. Energy climbs to 588, but that cross-onshore breeze messes with the face. Marginal, but there’s a wave if you find the right bank.
Saturday the 19th and Sunday the 20th are small—mostly under 3ft—with some glassy patches on Sunday arvo. That afternoon has a 2ft, 15-second south swell going glassy, energy 277. Clean but tiny.
Here’s the one to get excited about: Monday the 21st and Tuesday the 22nd. Monday morning starts with 3ft south swell and clean cross-offshore winds, energy hitting 418. But Monday afternoon is the real standout—4ft south swell, 14-second period, light offshore from the WNW, and energy climbing to 545. That’s pristine, lined-up surf at a reef and point. Tuesday’s just as good: clear skies, light offshores, 3ft to 3ft south swell with a 16 to 17-second period, energy around 462 to 571. Long-period groundswell loves a point break like this—clean, punchy, and you’ve got time between sets.
Wednesday the 23rd is a whole different animal. That southwest wind fires up to 30-35 km/h and the swell jumps to 10ft. Energy is massive—1740 in the morning, then a wild 3199 in the arvo. That’s big-wave territory, for experts only. With that fresh cross-offshore wind, it’ll be raw and heavy. Not for the casual surfer.
From Thursday the 24th onward, things settle back down—sub-3ft, glassy mornings, and some decent 13 to 16-second period swells. The 27th looks promising again, with a clean 4ft south swell and 634 energy on Sunday morning. But by Monday the 28th, that offshore wind is cranking at 30 km/h—clean face, but you might be getting blown off the wave.
Bottom line: the best bet is Monday 21st afternoon through Tuesday 22nd—clean, glassy, mid-size groundswell with proper lines. That’s the one to mark on the calendar.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Tue afternoon, min 9°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Thu afternoon. Very mild (max 16°C on Wed morning, min 6°C on Thu afternoon). Wind will be generally light. | ||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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 16 | S 16 | S 13 | S 11 | S 11 | S 11 | S 10 | S 9 | SSE 9 | S 8 | SSE 8 | SE 10 | S 15 | SSE 6 | SSE 5 | ESE 15 | ESE 13 | SE 13 | SE 12 |
Wave Graph | |||||||||||||||||||
2104 | 1301 | 932 | 736 | 485 | 375 | 234 | 180 | 106 | 49 | 20 | 16 | 17 | 71 | 73 | 199 | 465 | 464 | 330 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | on | cross | glassy | glassy | glassy | glassy | glassy | off | off | cross-on | cross | cross-off | cross-off | cross-off | cross-on | cross-on | cross-off |
High Tide | 5:42AM1.98m | 6:05PM1.99m | 6:38AM1.99m | 6:58PM1.95m | 7:31AM2.00m | 7:51PM1.91m | 8:20AM1.99m | 8:43PM1.87m | 9:06AM1.96m | 9:32PM1.84m | 9:50AM1.91m | 10:19PM1.81m | |||||||
Low Tide | 11:33PM0.38m | 11:57AM0.38m | 00:24AM0.41m | 12:48PM0.45m | 1:12AM0.46m | 1:39PM0.53m | 1:59AM0.53m | 2:30PM0.60m | 2:46AM0.61m | 3:20PM0.66m | 3:34AM0.68m | 4:09PM0.71m | |||||||
— | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | |
— | — | 6:12 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 4 | — | — | — |
Temp °C | 9 | 13 | 11 | 10 | 14 | 14 | 14 | 16 | 17 | 15 | 16 | 15 | 11 | 8 | 7 | 6 | 9 | 11 | 10 |
Feels °C | 6 | 10 | 8 | 8 | 12 | 12 | 13 | 14 | 16 | 13 | 14 | 12 | 9 | 4 | 3 | 3 | 6 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | S 13 | S 11 | S 11 | S 11 | S 10 | S 9 | SSE 9 | NE 6 | ENE 6 | ENE 6 | SE 10 | ESE 12 | ESE 11 | SE 6 | ESE 13 | SE 13 | SE 12 |
2104 | 1301 | 932 | 736 | 485 | 375 | 234 | 180 | 106 | 30 | 12 | 7 | 15 | 26 | 45 | 95 | 465 | 464 | 330 | |
Swell 2 Height (m) Direction Period (s) | NE 9 | NE 12 | NE 12 | E 9 | S 15 | SSW 16 | NE 4 | S 15 | NE 5 | S 8 | SSE 8 | SE 10 | NE 5 | SSW 14 | S 15 | ESE 15 | SE 6 | ESE 5 | S 15 |
3 | 6 | 6 | 2 | 115 | 80 | 4 | 39 | 23 | 49 | 20 | 16 | 4 | 41 | 19 | 199 | 38 | 17 | 116 | |
Swell 3 Height (m) Direction Period (s) | NE 13 | SE 11 | SE 10 | E 12 | E 11 | E 11 | S 16 | ENE 4 | S 14 | ESE 10 | SE 10 | S 8 | S 15 | ESE 7 | E 12 | SE 10 | SSW 16 | S 16 | E 4 |
6 | 5 | 4 | 3 | 3 | 2 | 43 | 1 | 16 | 11 | 16 | 5 | 17 | 5 | 3 | 23 | 85 | 44 | 9 | |
Wind waves Height (m) Direction Period (s) | NNE 3 | SW 3 | — | — | — | NE 3 | NNE 4 | NE 4 | NE 6 | — | — | — | S 4 | SSE 6 | SSE 5 | SSW 5 | — | NE 4 | SW 3 |
4 | 6 | — | — | — | 2 | 15 | 3 | 77 | — | — | — | 7 | 71 | 73 | 20 | — | 22 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 11 | 143 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 183 | 133 | 0 | 0 | 0 | 23 | 33 | 0 |
Best forecast wave conditions in Kaikoura and Marlborough | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
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Information about the Kahutara Surf forecast
The above surf forecast table for Kahutara provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kahutara can be found by selecting the local surf guide option on the grey menu. Our Kahutara 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 (Kahutara) 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 Kahutara 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.
Kahutara is 106 km (66 miles) from the city of Blenheim. If you plan a holiday in Kaikoura and Marlborough, look for hotels and other accommodation in Blenheim. Blenheim has rooms for a wide range of budgets as well as car hire and transport links.










