Surf Forecasts:
Blacks Reef surf forecast from 24 Aug 2026:
- Best quality surf: Monday 31 Aug, 9PM (local time) - 11ft (3.5m), 14s period, S swell with cross-onshore winds.
- Most powerful swell: Tuesday 1 Sep, 12AM (local time) - 13ft (4.0m), 15s period, S swell with 6,638 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 9AM (local time) - 4ft (1.2m), 12s period with S swell.
Best Forecast Surf Conditions for Blacks Reef this week:
The surf forecast for Blacks Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 9AM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.3m and 13s. Another secondary swell of 0.3m and 3s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Blacks Reef in the next 16 days are 4.0m 15s and forecast to arrive on Tuesday (Sep 01) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Saturday (Aug 29) at 12PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Tue 25th Aug) | 4ft (1.2m) 12s |
| Best Surf | 9PM (Mon 31st Aug) | 11ft (3.5m) 14s |
| Most Powerful | 12AM (Tue 1st Sep) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gonna break down the next couple of weeks at Blacks Reef for ya. It’s a bit of a slow burner, but there’s some real magic hiding in the long-range forecast.
The week kicks off on Tuesday, 25th August, with a fun little pulse. We’re looking at a clean 4ft to 4ft south swell rolling in with a nice 12-second period. The wind is light and variable, going glassy in the afternoon. Wave energy is moderate (417-467), and the water temp is sitting about average for the time of year. It’s not huge, but it’s clean, and the sets will have a bit of push. This is a great window for the beginner-friendly reef.
Wednesday, 26th August, is even better. The swell drops a touch to 3ft-3ft, but the period jumps to a very long 16-18 seconds. That’s proper groundswell energy, and the combined energy (515-546) is actually a tick higher. The wind is offshore on the morning and glassy in the afternoon. This is a classic Blacks Reef day – long, clean lines, easy paddling between sets. The consistency is very high, so you won’t be waiting long.
Thursday, 27th August, sees a size jump. The morning gets a bit messy with a cross-onshore breeze on a 6ft swell, but the afternoon is the real story. The swell hits 7ft from the south with a 17-second period, and it’s clean with a cross-offshore breeze. The combined energy is strong (2825). This is expert territory – over 8ft, it’s for experienced surfers only. The reef will be handling it well, but the power is serious.
Friday, 28th August, stays good. The morning offers a clean 5ft with a nice offshore breeze and moderate energy (798). The afternoon is a bit smaller and windier, but still clean. It’s a solid day.
The weekend, 29th-30th August, fades out. The swell drops below 3ft, and the energy drains away (down to 35 by Sunday arvo). The waves are still glassy, but tiny. This is a good time to clean the wax off your board.
We hit a dry spell from Monday, 31st August, through to Wednesday, 2nd September. The swell is small, periods are short, and the wind is mostly onshore or cross-shore. There’s a blip on Monday afternoon with a 3ft south swell and a 16-second period, but it’s blowing onshore, so it’s messy. Not worth paddling out for.
Now, the stand-out. Mark your calendars for Tuesday, 1st September. The morning brings a 10ft south swell with a 14-second period. The combined energy is massive (3574). That’s a powerful, heavy groundswell. The wind is offshore, light and clean. This is a true expert-only session. The reef will be a furnace, but for the few who can handle it, it’s the best wave of the forecast. The afternoon is still good, but a bit smaller and windier (8ft, 2237 energy).
The rest of the first week of September is a mixed bag. Wednesday, 2nd September, has a clean 5ft morning, but it’s windy. From Thursday, 3rd, through Friday, 4th, the wind swings onshore and the swell is junky with short periods. The setup looks more interesting for kite surfing than paddle surfing on those days.
We get one more window on Saturday, 5th September. The morning is magic: 5ft south swell, 13-second period, glassy conditions, and clean. The energy is solid (826). This is a beautiful, clean day for a paddle. The afternoon gets a bit bumpy with cross-shore wind.
After that, the forecast drops right off into tiny, weak waves with very low energy (20-37) through to 9th September. There’s a flicker of life on the 9th with a 5ft south-southwest swell, but the period is short (8 seconds) and the wind is strong. Not worth the drive.
So, the best on offer is the glassy morning of Saturday, 5th September, for a clean, fun swell. But the absolute standout is Tuesday, 1st September – that’s the big one for the experts. Get on it if you’ve got the skills.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Wed afternoon, min 9°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Sat morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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 13 | S 12 | S 12 | S 15 | S 18 | S 16 | S 16 | S 17 | S 17 | S 15 | S 13 | S 13 | S 12 | S 11 | S 11 | S 11 | S 10 | S 10 | SSW 7 |
Wave Graph | |||||||||||||||||||
851 | 439 | 294 | 218 | 390 | 520 | 391 | 1722 | 2813 | 1635 | 780 | 534 | 290 | 209 | 157 | 116 | 73 | 31 | 26 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | cross-off | cross-off | glassy | cross-off | cross-on | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | glassy | cross |
High Tide | 2:58AM1.40m | 3:28PM1.49m | 3:46AM1.38m | 4:13PM1.49m | 4:33AM1.38m | 4:59PM1.50m | 5:22AM1.41m | 5:47PM1.53m | 6:11AM1.46m | 6:33PM1.57m | 6:58AM1.52m | 7:20PM1.62m | |||||||
Low Tide | 9:11AM0.44m | 9:43PM0.43m | 10:00AM0.41m | 10:29PM0.39m | 10:48AM0.36m | 11:15PM0.34m | 11:32AM0.32m | 00:03AM0.30m | 12:17PM0.28m | 00:49AM0.26m | 1:02PM0.25m | 1:35AM0.24m | |||||||
— | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | |
— | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 15 | 16 | 12 | 16 | 18 | 15 | 12 | 12 | 12 | 16 | 17 | 14 | 19 | 18 | 13 | 14 | 16 | 12 |
Feels °C | 8 | 13 | 14 | 9 | 14 | 16 | 11 | 10 | 10 | 9 | 12 | 13 | 10 | 16 | 15 | 11 | 13 | 14 | 9 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 12 | S 12 | S 11 | S 18 | S 16 | S 16 | S 17 | S 17 | S 15 | S 13 | S 13 | S 12 | S 11 | S 11 | S 11 | S 10 | S 10 | SSW 7 |
851 | 439 | 294 | 143 | 390 | 520 | 391 | 1722 | 2813 | 1635 | 780 | 534 | 290 | 209 | 157 | 116 | 73 | 31 | 26 | |
Swell 2 Height (m) Direction Period (s) | NE 4 | SE 13 | S 18 | S 15 | SSW 10 | SE 13 | SE 12 | SSW 7 | ESE 11 | ESE 10 | SE 15 | NE 5 | ESE 14 | SE 13 | NE 6 | NE 6 | NE 6 | NE 6 | S 9 |
3 | 27 | 97 | 218 | 98 | 26 | 23 | 77 | 12 | 11 | 9 | 25 | 18 | 28 | 30 | 23 | 9 | 7 | 16 | |
Swell 3 Height (m) Direction Period (s) | SE 13 | NE 5 | SE 13 | SE 12 | SE 13 | NE 10 | E 10 | ESE 11 | — | E 16 | SE 15 | SE 15 | N 9 | SE 13 | S 16 | S 15 | SSW 14 | SW 5 | ENE 6 |
45 | 3 | 26 | 25 | 27 | 4 | 2 | 12 | — | 5 | 9 | 9 | 2 | 28 | 21 | 67 | 36 | 4 | 4 | |
Wind waves Height (m) Direction Period (s) | NNE 4 | WNW 3 | — | — | NW 3 | — | NW 3 | S 6 | — | NE 4 | NE 4 | NE 5 | NE 5 | NE 5 | NE 7 | SSW 3 | WNW 3 | — | NW 3 |
10 | 1 | — | — | 2 | — | 2 | 74 | — | 14 | 29 | 50 | 35 | 31 | 100 | 1 | 1 | — | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 6 | 0 | 0 | 0 | 3 | 3 | 0 | 3 | 0 | 0 | 10 | 65 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Blacks Reef Surf forecast
The above surf forecast table for Blacks Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Blacks Reef can be found by selecting the local surf guide option on the grey menu. Our Blacks 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 (Blacks 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 Blacks 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.
Blacks Reef is 50 km (31 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.











