Surf Forecasts:
Mangamaunu surf forecast from 11 Jul 2026:
- Best quality surf: Friday 17 Jul, 9PM (local time) - 4.5ft (1.4m), 16s period, ESE swell with cross-offshore winds.
- Most powerful swell: Sunday 19 Jul, 12AM (local time) - 10ft (3.0m), 15s period, S swell with 4,282 kJ wave energy.
- Next surfable swell (1★+): Sunday 12 Jul, 12AM (local time) - 3.5ft (1.0m), 9s period with E swell.
Best Forecast Surf Conditions for Mangamaunu this week:
The surf forecast for Mangamaunu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 12) at 12AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.6m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mangamaunu in the next 16 days are 3.0m 15s and forecast to arrive on Sunday (Jul 19) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Saturday (Jul 18) at 3AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 12th Jul) | 3.5ft (1.0m) 9s |
| Best Surf | 9PM (Fri 17th Jul) | 4.5ft (1.4m) 16s |
| Most Powerful | 12AM (Sun 19th Jul) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Mangamaunu over the next 16 days.
Alright mates, Rusty here. Let’s break down what’s coming for Mangamaunu over the next couple of weeks.
We’re starting off slow, but there’s some real meat later on. Water temp is about 52°F, which is a little warmer than usual for this time of year, so not too bad.
The first few days are pretty quiet. Small, weak swell with combined energy under 200 (weak). There’s a tiny pulse on Sunday the 12th morning with a clean 3ft S swell at 12 seconds, but it’s small. The wind is offshore from the NNW at 5 km/h, so it’ll be clean. That’s the best of the early stuff, but it’s not much.
Then we hit a real lull from Monday the 13th through to Thursday the 17th. Swell drops to almost nothing, with energy in the double digits. Not worth suiting up.
Now, here’s the good stuff. Friday the 17th morning is the first real standout. Clean 3ft groundswell from the ESE, with a 16-second period – that’s long-period energy. Combined energy is a solid 565 (moderate). Wind is light offshore from the WSW, so it’ll be glassy and lined up. This point break will love that long period. Crowds are rare, which is a bonus. This is your best early option.
The weekend of the 18th and 19th gets big, maybe too big. Saturday the 18th has 10ft of SSW swell, but with a short 8-second period, so it’ll be messy. The wind is offshore and strong at 25 km/h, so it’ll be clean, but that’s expert territory only. The combined energy is massive – 2789 (strong).
Sunday the 19th is the real standout of the whole forecast. The morning has 7ft of S groundswell, a 14-second period, and combined energy of 2119 (strong). Wind is light offshore from the WNW. The afternoon goes glassy with 6ft from the same direction. This is excellent for experienced surfers – long, powerful, clean lines. If you can handle it, this is the session.
After that, the swell eases through the last week of July. Monday the 20th morning still has a nice 5ft S swell at 12 seconds with offshore wind, but it’s a step down. There are a few more clean windows on the 23rd and 24th, with 5-6ft E/ENE swell, but the period drops a bit. Thursday the 23rd afternoon looks clean and glassy with a 6ft ENE swell – a solid runner.
So, first week is a bust, but from the 17th onward, there’s some serious quality. The 17th morning and the 19th are your best bets. Get out there.
- Rusty
Short Range ForecastMostly dry. Very mild (max 16°C on Tue morning, min 5°C on Sat afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Very mild (max 17°C on Wed morning, min 8°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sat 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | E 10 | E 9 | S 12 | S 11 | S 10 | N 5 | S 13 | S 9 | ESE 10 | ESE 10 | E 11 | E 12 | N 6 | SSW 16 | ESE 13 | ESE 15 | ESE 15 | ESE 16 | ESE 16 | ESE 15 | SSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 320 | 175 | 184 | 110 | 68 | 71 | 85 | 15 | 18 | 18 | 20 | 46 | 66 | 53 | 60 | 167 | 252 | 481 | 742 | 917 | 928 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-on | cross-off | cross-off | cross | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-off | cross-off | cross-on | off | cross-off |
High Tide | 1:55AM1.50m | 2:28PM1.68m | 2:53AM1.53m | 3:25PM1.74m | 3:50AM1.57m | 4:22PM1.79m | 4:47AM1.59m | 5:19PM1.80m | 5:44AM1.59m | 6:15PM1.79m | 6:41AM1.58m | 7:11PM1.74m | 7:37AM1.56m | ||||||||
Low Tide | 7:48PM0.14m | 8:05AM0.08m | 8:47PM0.10m | 9:02AM0.03m | 9:46PM0.06m | 10:00AM-0.01m | 10:45PM0.02m | 10:58AM-0.04m | 11:42PM0.00m | 11:56AM-0.05m | 00:39AM-0.00m | 12:54PM-0.04m | 1:35AM0.01m | ||||||||
 |  | | | | |  |  | | | | |  |  | | | | | | | | |
 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:48 | — | — | 7:48 | — | — | 7:48 |
 | 5:07 | — | — | 5:08 | — | — | 5:09 | — | — | 5:10 | — | — | 5:12 | — | — | 5:12 | — | — | 5:13 | — | 5:14 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | 7 | — |
Temp °C | 8 | 5 | 9 | 10 | 8 | 12 | 13 | 11 | 16 | 16 | 14 | 17 | 17 | 9 | 11 | 12 | 11 | 12 | 11 | 10 | 8 |
Feels °C | 5 | 2 | 6 | 7 | 5 | 9 | 10 | 8 | 14 | 15 | 10 | 15 | 15 | 4 | 9 | 10 | 8 | 9 | 8 | 7 | 0 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | S 13 | S 9 | ENE 6 | NNE 6 | NE 6 | NNE 5 | NNE 5 | E 11 | SSE 5 | SSE 5 | ESE 15 | ESE 16 | ESE 16 | ESE 15 | ESE 15 |
| kJ | 320 | 175 | 108 | 81 | 59 | 42 | 85 | 14 | 14 | 13 | 16 | 11 | 11 | 21 | 35 | 22 | 252 | 481 | 742 | 917 | 924 |
Swell 2 Height (m) Direction Period (s) | S 16 | S 14 | S 12 | S 11 | S 10 | S 9 | ESE 9 | ESE 9 | NNE 6 | ENE 6 | E 11 | E 12 | E 12 | ESE 13 | ESE 13 | ESE 15 | S 7 | SSW 14 | SSW 14 | S 14 | S 22 |
| kJ | 186 | 150 | 184 | 110 | 68 | 41 | 28 | 15 | 16 | 8 | 20 | 46 | 44 | 34 | 60 | 167 | 25 | 69 | 67 | 15 | 345 |
Swell 3 Height (m) Direction Period (s) | SSW 9 | S 5 | — | S 16 | NE 4 | NE 5 | ESE 9 | SSW 12 | ESE 10 | ESE 10 | E 13 | S 16 | SSW 16 | SSW 16 | E 10 | E 10 | SSW 15 | NE 4 | NE 5 | SSW 14 | — |
| kJ | 25 | 8 | — | 20 | 12 | 14 | 28 | 15 | 18 | 18 | 14 | 20 | 50 | 53 | 18 | 7 | 43 | 2 | 10 | 18 | — |
Wind waves Height (m) Direction Period (s) | S 5 | — | — | NE 3 | NNE 4 | N 5 | NNE 6 | NNE 7 | — | N 6 | NW 2 | NNW 3 | N 6 | S 5 | — | — | N 2 | NNE 4 | — | SSW 10 | SSW 8 |
| kJ | 13 | — | — | 4 | 34 | 71 | 47 | 99 | — | 91 | 1 | 3 | 66 | 37 | — | — | 1 | 13 | — | 51 | 928 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 23 | 0 | 0 | 100 | 0 | 0 | 4 | 0 | 1 | 123 | 0 | 0 | 0 | 23 | 13 | 13 | 0 | 0 | 13 | 0 | 72 |
Best forecast wave conditions in Kaikoura and Marlborough | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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Information about the Mangamaunu Surf forecast
The above surf forecast table for Mangamaunu provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mangamaunu can be found by selecting the local surf guide option on the grey menu. Our Mangamaunu 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 (Mangamaunu) 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 Mangamaunu 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.
Mangamaunu is 89 km (55 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.
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