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Mangamaunu Surf Forecast
/ Kaikoura and Marlborough (12 surf breaks) /
Mangamaunu surfForecast / Kaikoura and Marlborough / New Zealand
12 Day Weather and Surf, issued 11 pm Sunday 17 Aug 2025 NZST
Best Forecast Surf Conditions for Mangamaunu this week:
The surf forecast for Mangamaunu over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 18) at 3AM. The primary swell is predicted to be 0.3m and 15s period with a secondary swell of 0.3m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Mangamaunu in the next 12 days are 5.0m 11s and forecast to arrive on Tuesday (Aug 19) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Tuesday (Aug 19) at 6AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 18th Aug) | 1ft (0.3m) 15s |
| Best Surf | 12PM (Tue 19th Aug) | 13ft (4.0m) 9s |
| Most Powerful | 6PM (Tue 19th Aug) | 16ft (5.0m) 11s |
Table - best surf conditions forecast for Mangamaunu over the next 12 days.
Short Range Forecast Moderate rain (total 16mm), heaviest on Tue morning. Very mild (max 13°C on Mon afternoon, min 4°C on Tue night). Winds increasing (calm on Sun night, strong winds from the SSW by Tue afternoon). | Days 3-6 Weather Summary Mostly dry. Very mild (max 12°C on Sat morning, min 6°C on Wed night). Wind will be generally light. | |||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sun 24 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||
| Period(s) (?) | 16 | 16 | 15 | 13 | 7 | 11 | 10 | 9 | 8 | 8 | 8 | 15 | 15 | 14 | 14 | 15 | 14 | 9 | 8 | 11 | 11 | |
Wave (?)Graph  | ||||||||||||||||||||||
| Energy (?) | 139 | 125 | 148 | 498 | 555 | 5431 | 2839 | 1147 | 775 | 854 | 501 | 435 | 579 | 558 | 1199 | 459 | 515 | 198 | 97 | 181 | 163 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | glass | on | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | cross- off | off | glass | cross- on | glass | glass | on | |
High Tide / height (m) | 11:42PM 1.49 | 12:14PM 1.62 | 12:39AM 1.48 | 1:11PM 1.63 | 1:36AM 1.48 | 2:07PM 1.64 | 2:30AM 1.48 | 3:00PM 1.64 | 3:22AM 1.48 | 3:52PM 1.63 | 4:13AM 1.47 | 4:41PM 1.60 | 5:03AM 1.46 | 5:30PM 1.57 | ||||||||
Low Tide / height (m) | 5:53AM 0.11 | 6:33PM 0.15 | 6:49AM 0.11 | 7:30PM 0.15 | 7:45AM 0.11 | 8:26PM 0.15 | 8:40AM 0.10 | 9:20PM 0.15 | 9:33AM 0.10 | 10:12PM 0.15 | 10:24AM 0.11 | 11:02PM 0.15 | 11:15AM 0.12 | |||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sun 24 | ||||||||||||||||
| Sunrise | - | 7:13 | - | - | 7:11 | - | - | 7:09 | - | - | 7:09 | - | - | 7:07 | - | - | 7:05 | - | - | 7:03 | - | |
| Sunset | - | - | 5:44 | - | - | 5:45 | - | - | 5:45 | - | - | 5:46 | - | - | 5:47 | - | - | 5:49 | - | - | 5:50 | |
 |  |  |  |  |  | | |  |  | | | | | |  | | | | | | ||
Rain (mm) | - | - | - | 1 | 9 | 2 | 2 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | |
| Temp. °C | 10 | 12 | 13 | 11 | 6 | 6 | 5 | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 9 | 12 | 11 | 9 | 11 | 11 | |
| Feels °C (?) | 7 | 9 | 11 | 8 | 0 | -4 | -3 | 2 | 3 | 3 | 6 | 6 | 6 | 7 | 7 | 6 | 9 | 8 | 7 | 9 | 9 | |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Kaikoura and Marlborough
Cross-off wind 13 km from Mangamaunu has swung offshore (light winds from the WSW at KaikouraAws). 0.5m 6s windswell from the ENE with a 0.3m 8s swell from the S and a 0.3m 9s swell from the ENE as well as a 0.2m 2s local chop from the SSW. 4 swells combining to make bigger set waves.
Actual: 51 min ago
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Mangamaunu surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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 12 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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