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Mahia Reef surfForecast / Gisborne and Mahia / New Zealand
12 Day Weather and Surf, issued 11 am Sunday 14 Sep 2025 NZST
Best Forecast Surf Conditions for Mahia Reef this week:
The surf forecast for Mahia Reef over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 15) at 12PM. The primary swell is predicted to be 2.2m and 11s period with a secondary swell of 0.1m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mahia Reef in the next 12 days are 4.0m 12s and forecast to arrive on Sunday (Sep 14) at 6PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Saturday (Sep 20) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Mon 15th Sep) | 7ft (2.2m) 11s |
| Best Surf | 12PM (Mon 15th Sep) | 7ft (2.2m) 11s |
| Most Powerful | 6PM (Sun 14th Sep) | 13ft (4.0m) 12s |
Table - best surf conditions forecast for Mahia Reef over the next 12 days.
Short Range Forecast Light rain (total 4mm), mostly falling on Sun morning. Very mild (max 17°C on Tue morning, min 8°C on Sun night). Winds decreasing (strong winds from the SSW on Sun afternoon, light winds from the NE by Mon morning). | Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Fri morning. Warm (max 21°C on Wed afternoon, min 6°C on Fri night). Winds increasing (light winds from the NW on Wed morning, strong winds from the SSW by Fri afternoon). | ||||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 7 | 12 | 12 | 11 | 10 | 10 | 9 | 9 | 15 | 12 | 10 | 9 | 10 | 10 | 14 | 8 | 9 | 11 | 10 | 10 | 10 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 206 | 3068 | 3587 | 1367 | 873 | 377 | 198 | 157 | 155 | 146 | 67 | 28 | 33 | 18 | 36 | 829 | 1051 | 1771 | 708 | 676 | 384 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross- on | cross- on | cross- off | on | cross- on | cross- off | cross- on | cross- on | on | on | cross- on | on | on | cross | cross | cross | cross- on | cross- off | on |
High Tide / height (m) | 10:42AM 1.85 | 11:17PM 1.74 | 11:42AM 1.80 | 12:14AM 1.69 | 12:43PM 1.75 | 1:12AM 1.62 | 1:42PM 1.70 | 2:10AM 1.57 | 2:37PM 1.66 | 3:06AM 1.52 | 3:30PM 1.62 | 3:59AM 1.49 | 4:21PM 1.60 | ||||||||
Low Tide / height (m) | 5:07PM 0.16 | 5:29AM 0.16 | 6:06PM 0.18 | 6:26AM 0.19 | 7:05PM 0.20 | 7:23AM 0.20 | 8:03PM 0.21 | 8:20AM 0.22 | 8:57PM 0.22 | 9:17AM 0.23 | 9:50PM 0.24 | 10:11AM 0.23 | 10:42PM 0.25 | ||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||
| Sunrise | 6:11 | - | - | 6:09 | - | - | 6:07 | - | - | 6:05 | - | - | 6:05 | - | - | 6:03 | - | - | 6:01 | - | - |
| Sunset | - | 5:57 | - | - | 5:58 | - | - | 5:59 | - | - | 6:00 | - | - | 6:00 | - | - | 6:00 | - | - | 6:01 | - |
 | |  |  | |  | | | |  | | | |  | | |  | | | | | |
Rain (mm) | 2 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | 4 | 2 | - | - | - | - |
| Temp. °C | 10 | 10 | 10 | 13 | 13 | 13 | 17 | 17 | 15 | 20 | 21 | 15 | 19 | 19 | 14 | 9 | 10 | 10 | 9 | 11 | 11 |
| Feels °C (?) | 5 | 1 | 3 | 11 | 9 | 10 | 14 | 15 | 12 | 17 | 16 | 9 | 14 | 14 | 8 | 1 | 1 | 1 | 6 | 6 | 6 |
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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 Gisborne and Mahia
Cross-shore wind at Mahia Reef have swung cross-off (moderate winds from the S at Mahia Automatic Weather Station 9 km from Mahia Reef). 3.6m 11s groundswell from the S which is too big for here.- Recent cross-onshore wind has turned cross-shore at Wainui Beach - Stockroute (fresh winds from the S at Gisborne Airport 9 km from Wainui Beach - Stockroute). 3.1m 11s groundswell from the S which is too big for here.
Actual: 48 min ago
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Information about the Mahia Reef Surf forecast
The above surf forecast table for Mahia Reef provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Mahia Reef can be found by selecting the local surf guide option on the grey menu. Our Mahia Reef 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 (Mahia Reef) 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 Mahia Reef 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.
Mahia Reef is 49 km (30 miles) from the city of Gisborne. If you plan a holiday in Gisborne and Mahia, look for hotels and other accommodation in Gisborne. Gisborne has rooms for a wide range of budgets as well as car hire and transport links.
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