Surf Forecasts:
Mahia Spit surf forecast from 17 Aug 2026:
- Best quality surf: Thursday 20 Aug, 12PM (local time) - 3.5ft (1.0m), 8s period, ESE swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 12AM (local time) - 5.5ft (1.7m), 9s period, ESE swell with 430 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 12PM (local time) - 3.5ft (1.0m), 8s period with ESE swell.
Best Forecast Surf Conditions for Mahia Spit this week:
The surf forecast for Mahia Spit over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 12PM. The primary swell is predicted to be 1.0m and 8s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Mahia Spit in the next 16 days are 1.7m 9s and forecast to arrive on Thursday (Aug 20) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 5.0m 11s period and expected on Tuesday (Aug 18) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Thu 20th Aug) | 3.5ft (1.0m) 8s |
| Best Surf | 12PM (Thu 20th Aug) | 3.5ft (1.0m) 8s |
| Most Powerful | 12AM (Thu 20th Aug) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Mahia Spit over the next 16 days.
Short Range ForecastModerate rain (total 16mm), heaviest on Wed night. Very mild (max 10°C on Mon morning, min 8°C on Mon night). Winds decreasing (gales from the SSW on Tue night, fresh winds from the SW by Wed night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Sat afternoon, min 9°C on Thu morning). Winds decreasing (fresh winds from the SW on Thu morning, calm by Fri morning). | ||||||||||||||||||||
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) | E 9 | E 10 | E 9 | E 9 | E 10 | S 12 | SE 14 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 13 | ESE 13 | ESE 13 | ESE 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 293 | 279 | 110 | 60 | 18 | 0 | 49 | 360 | 430 | 222 | 140 | 73 | 116 | 121 | 54 | 36 | 18 | 34 | 33 | 34 | 30 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | off | off | cross-off | cross-off | off | off | off | cross | cross | cross-on | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross |
High Tide | 9:08AM1.52m | 9:30PM1.55m | 9:58AM1.49m | 10:19PM1.49m | 10:47AM1.45m | 11:07PM1.43m | 11:35AM1.41m | 11:54PM1.37m | 12:23PM1.37m | 00:42AM1.32m | 1:11PM1.34m | 1:30AM1.29m | 2:00PM1.33m | 2:19AM1.27m | |||||||
Low Tide | 3:22PM0.10m | 3:51AM0.09m | 4:12PM0.15m | 4:37AM0.14m | 5:00PM0.21m | 5:24AM0.20m | 5:48PM0.27m | 6:09AM0.26m | 6:36PM0.32m | 6:55AM0.30m | 7:24PM0.36m | 7:42AM0.33m | 8:13PM0.38m | ||||||||
 |  |  | | |  | | | |  | |  | | | | | |  |  | | | |
 | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — |
 | — | 5:31 | — | — | 5:32 | — | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — |
mm | — | 2 | 2 | 2 | 1 | 4 | 2 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 9 | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 12 | 14 | 12 | 15 | 17 | 15 | 16 | 13 | 12 |
Feels °C | -1 | -1 | 0 | -2 | -4 | -4 | -2 | 1 | 1 | 4 | 6 | 8 | 10 | 11 | 6 | 11 | 13 | 10 | 11 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | E 9 | E 10 | E 9 | E 9 | E 10 | — | SE 14 | ESE 9 | S 14 | S 13 | S 9 | S 8 | S 16 | S 16 | S 14 | S 12 | S 11 | S 11 | S 10 | SSE 10 | S 6 |
| kJ | 293 | 279 | 110 | 60 | 18 | — | 49 | 360 | 2545 | 1553 | 381 | 270 | 1314 | 1107 | 529 | 235 | 166 | 114 | 55 | 33 | 21 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 15 | N 11 | ENE 10 | — | — | — | — | ESE 9 | ESE 8 | ESE 8 | ESE 8 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 13 | ESE 13 | ESE 13 | ESE 12 |
| kJ | 306 | 270 | 2 | 31 | — | — | — | — | 430 | 222 | 140 | 73 | 116 | 121 | 54 | 36 | 18 | 34 | 33 | 34 | 30 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SSE 9 | — | S 13 | S 12 | — | — | E 15 | E 14 | E 14 | SE 8 | — | NNW 3 | S 9 |
| kJ | — | — | — | — | — | — | — | — | 101 | — | 212 | 112 | — | — | 5 | 15 | 15 | 2 | — | 1 | 15 |
Wind waves Height (m) Direction Period (s) | SSE 10 | SSE 9 | SSE 9 | S 9 | S 10 | S 12 | SSE 12 | S 12 | SSW 14 | SSW 14 | SSW 9 | — | — | — | NNW 2 | W 3 | NNW 3 | NW 3 | NW 3 | WSW 3 | N 2 |
| kJ | 2203 | 1568 | 1323 | 1064 | 2617 | 6662 | 5521 | 3607 | 3731 | 2409 | 773 | — | — | — | 1 | 1 | 1 | 2 | 1 | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 269 | 100 | 86 | 100 | 295 | 169 | 100 | 92 | 84 | 2 | 0 | 7 | 7 | 6 | 33 | 9 | 7 | 33 | 56 | 2 | 9 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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Information about the Mahia Spit Surf forecast
The above surf forecast table for Mahia Spit provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mahia Spit can be found by selecting the local surf guide option on the grey menu. Our Mahia Spit 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 Spit) 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 Spit 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 Spit is 48 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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