Surf Forecasts:
Mahia Reef surf forecast from 17 Aug 2026:
- Best quality surf: Thursday 20 Aug, 6PM (local time) - 6ft (1.8m), 8s period, S swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 3AM (local time) - 18ft (5.5m), 12s period, S swell with 8,302 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 6PM (local time) - 6ft (1.8m), 8s period with S swell.
Best Forecast Surf Conditions for Mahia Reef this week:
The surf forecast for Mahia Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 6PM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.7m and 12s. Another secondary swell of 1.8m and 8s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mahia Reef in the next 16 days are 5.5m 12s and forecast to arrive on Wednesday (Aug 19) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Monday (Aug 24) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 20th Aug) | 6ft (1.8m) 8s |
| Best Surf | 6PM (Thu 20th Aug) | 6ft (1.8m) 8s |
| Most Powerful | 3AM (Wed 19th Aug) | 18ft (5.5m) 12s |
Table - best surf conditions forecast for Mahia Reef over the next 16 days.
Short Range ForecastModerate rain (total 16mm), heaviest on Mon morning. Very mild (max 10°C on Tue morning, min 8°C on Mon night). Winds decreasing (near gales from the SSW on Tue night, moderate winds from the SSW by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Sat afternoon, min 8°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | S 10 | S 9 | S 9 | S 9 | S 10 | S 12 | S 12 | S 12 | S 14 | S 13 | S 8 | S 8 | S 16 | S 16 | S 13 | S 12 | S 11 | S 11 | S 10 | SE 13 | SSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2616 | 1636 | 1436 | 1291 | 3126 | 8216 | 5929 | 4523 | 4151 | 2431 | 513 | 316 | 1456 | 1258 | 599 | 285 | 202 | 114 | 72 | 44 | 31 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | glassy | on | on | on | on | on | cross-off | cross-on |
High Tide | 9:21PM1.76m | 9:46AM1.75m | 10:10PM1.71m | 10:33AM1.72m | 10:59PM1.67m | 11:22AM1.67m | 11:48PM1.62m | 12:14PM1.62m | 00:35AM1.57m | 1:06PM1.58m | 1:22AM1.51m | 1:56PM1.54m | 2:10AM1.45m | ||||||||
Low Tide | 3:09PM0.20m | 3:39AM0.22m | 4:01PM0.28m | 4:27AM0.30m | 4:51PM0.34m | 5:15AM0.36m | 5:41PM0.40m | 6:03AM0.41m | 6:30PM0.44m | 6:49AM0.45m | 7:20PM0.47m | 7:35AM0.46m | 8:10PM0.48m | ||||||||
 | |  |  | |  | | | |  | |  | | | | | |  |  | | | |
 | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — |
 | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — |
mm | 1 | 2 | 2 | 1 | 1 | 4 | 2 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 9 | 9 | 9 | 10 | 9 | 8 | 9 | 10 | 10 | 10 | 10 | 9 | 13 | 15 | 12 | 16 | 17 | 15 | 16 | 14 | 11 |
Feels °C | -1 | 0 | 0 | -1 | -3 | -5 | -1 | 2 | 2 | 6 | 7 | 7 | 11 | 13 | 6 | 12 | 13 | 10 | 11 | 9 | 7 |
Swell 1 Height (m) Direction Period (s) | E 10 | ESE 10 | E 10 | SE 9 | SE 11 | ESE 11 | ESE 13 | SE 9 | S 14 | S 13 | S 8 | S 8 | S 16 | S 16 | S 13 | S 12 | S 11 | S 11 | S 10 | S 10 | SSW 6 |
| kJ | 296 | 112 | 71 | 269 | 229 | 84 | 18 | 481 | 3944 | 1710 | 513 | 316 | 1456 | 1258 | 599 | 285 | 202 | 114 | 72 | 31 | 31 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | E 10 | — | E 10 | — | ESE 15 | SE 14 | — | ESE 9 | SE 8 | SE 8 | S 12 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 13 | SE 13 | SE 13 | ESE 12 |
| kJ | 376 | 200 | — | 45 | — | 23 | 48 | — | 258 | 201 | 95 | 187 | 102 | 84 | 45 | 23 | 14 | 44 | 42 | 44 | 15 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SSE 9 | — | S 18 | S 17 | ESE 10 | — | SE 15 | ESE 14 | ESE 13 | NE 4 | — | S 16 | S 9 |
| kJ | — | — | — | — | — | — | — | — | 101 | — | 25 | 206 | 125 | — | 9 | 19 | 18 | 1 | — | 5 | 16 |
Wind waves Height (m) Direction Period (s) | S 10 | S 9 | S 9 | S 9 | S 10 | S 12 | S 12 | S 12 | SSW 14 | S 13 | — | — | — | — | WNW 3 | NW 3 | NW 3 | NW 4 | NW 3 | W 3 | N 2 |
| kJ | 2616 | 1636 | 1436 | 1291 | 3126 | 8216 | 5929 | 4523 | 4151 | 2431 | — | — | — | — | 6 | 5 | 2 | 18 | 6 | 3 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 263 | 95 | 80 | 95 | 292 | 170 | 95 | 87 | 78 | 4 | 4 | 2 | 2 | 0 | 34 | 8 | 4 | 34 | 50 | 8 | 6 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Mahia Reef 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 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 16 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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