Surf Forecasts:
Blacks Reef surf forecast from 21 Aug 2026:
- Best quality surf: Monday 24 Aug, 6PM (local time) - 10ft (3.0m), 15s period, S swell with offshore winds.
- Most powerful swell: Monday 24 Aug, 6PM (local time) - 10ft (3.0m), 15s period, S swell with 3,360 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 6PM (local time) - 5.5ft (1.7m), 15s 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 Friday (Aug 21) at 6PM. The primary swell is predicted to be 1.7m and 15s period with a secondary swell of 0.6m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Blacks Reef in the next 16 days are 3.0m 15s and forecast to arrive on Monday (Aug 24) at 6PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Sunday (Aug 23) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 21st Aug) | 5.5ft (1.7m) 15s |
| Best Surf | 6PM (Mon 24th Aug) | 10ft (3.0m) 15s |
| Most Powerful | 6PM (Mon 24th Aug) | 10ft (3.0m) 15s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
Alright folks, Rusty here, and I've been chewing on the local charts. Let's get into it, because there's some proper stuff on the way.
We're starting off this Friday, August 21st, with a solid hit of energy. The water is sitting at a chilly 54°F, which is a couple of degrees cooler than usual for this time of year – so grab a thicker wetsuit.
The pick of the crop is Blacks Reef first thing Friday morning. We've got a clean 6ft S'ly groundswell with a long 16-second period, packing some serious 1914 units of energy. The wind is a light, cross-off breeze from the NW, which will keep the faces clean. This is excellent for experienced surfers – the power is on, and those long gaps between sets will make the paddle out a bit easier. The afternoon holds up nicely too, with a similar 6ft S'ly swell.
Saturday morning the swell eases a bit to 4ft, still clean. But the real treat is Saturday afternoon when it goes glassy with a light WNW breeze. That 4ft S'ly swell will be silky smooth – perfect for a log or a funboard.
Sunday is a write-off, with strong 25 km/h NW winds chopping everything up. The surf drops below 3ft and the energy is weak (136 units). We then have a quiet spell until late Monday.
Monday afternoon, August 24th, is a big one for the experienced crew. The wind goes glassy again, and the S'ly swell jumps to a solid 8ft with a 16-second period. The energy is a massive 2809 units. This is big, powerful, and clean. It's expert-only territory – if you're not comfortable in overhead, meaty waves, sit this one out.
The rest of the week is a mix of smaller, cleaner waves, with the swell hanging between 2ft and 5ft. The wind is generally light and cross-off, so it's a solid run for the intermediate surfer.
Looking into the second week, we get a very interesting window. On Monday, August 31st, the morning is glassy again with a 4ft S'ly swell at 14 seconds. Then on September 3rd and 4th, the charts are showing some serious numbers. The swell is predicted to hit 18ft on Thursday the 3rd and 12ft on Friday the 4th, with extreme energy values (over 11000). The wind is favorable on the 4th (Friday) with a glassy morning and clean cross-off in the afternoon. This is only for the hardcore, experienced crew – the size is absolutely massive. It's a long-range forecast, so keep an eye on it, but it could be an absolute classic.
The rest of the run into early September gets a bit messy with onshore winds, so we'll have to wait and see. The best bets for the coming week are definitely the Monday afternoon pulse and that glassy Saturday afternoon.
Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 16°C on Sat afternoon, min 7°C on Fri night). Winds increasing (calm on Fri morning, fresh winds from the NW by Sun morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Tue afternoon, min 9°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 16 | S 16 | S 13 | S 12 | S 12 | S 11 | S 10 | SE 13 | SE 13 | SSW 9 | S 16 | S 13 | S 12 | S 11 | S 10 | S 17 | S 17 | S 16 | S 15 | S 14 | S 17 |
Wave Graph | |||||||||||||||||||||
1672 | 1402 | 653 | 400 | 319 | 189 | 102 | 50 | 43 | 505 | 2756 | 1634 | 604 | 350 | 214 | 293 | 465 | 529 | 441 | 297 | 812 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross | cross-on | glassy | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off |
High Tide | 12:14PM1.62m | 00:35AM1.57m | 1:06PM1.58m | 1:22AM1.51m | 1:56PM1.54m | 2:10AM1.45m | 2:43PM1.52m | 2:58AM1.40m | 3:28PM1.49m | 3:46AM1.38m | 4:13PM1.49m | 4:33AM1.38m | 4:59PM1.50m | ||||||||
Low Tide | 6:30PM0.44m | 6:49AM0.45m | 7:20PM0.47m | 7:35AM0.46m | 8:10PM0.48m | 8:23AM0.46m | 8:57PM0.47m | 9:11AM0.44m | 9:43PM0.43m | 10:00AM0.41m | 10:29PM0.39m | 10:48AM0.36m | 11:15PM0.34m | ||||||||
6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | |
— | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 13 | 10 | 14 | 16 | 12 | 16 | 16 | 12 | 13 | 13 | 11 | 15 | 17 | 13 | 16 | 17 | 14 | 16 | 18 | 13 |
Feels °C | 10 | 10 | 6 | 11 | 14 | 7 | 10 | 11 | 7 | 10 | 10 | 7 | 13 | 14 | 10 | 14 | 14 | 11 | 15 | 15 | 10 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | S 13 | S 12 | S 12 | S 11 | S 10 | S 10 | SW 4 | ESE 13 | S 16 | S 13 | S 12 | S 11 | S 10 | S 10 | S 17 | S 16 | S 15 | S 14 | S 17 |
1672 | 1402 | 653 | 400 | 319 | 189 | 102 | 50 | 9 | 34 | 2756 | 1634 | 604 | 350 | 214 | 118 | 465 | 529 | 441 | 297 | 812 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 9 | SE 9 | ESE 8 | ESE 13 | ESE 13 | SE 13 | SE 13 | S 18 | ESE 13 | SE 13 | SE 13 | S 16 | S 15 | S 17 | S 9 | SE 12 | ESE 11 | S 17 | ESE 10 |
104 | 102 | 43 | 20 | 7 | 33 | 34 | 44 | 43 | 6 | 18 | 28 | 27 | 85 | 109 | 293 | 60 | 23 | 11 | 137 | 11 | |
Swell 3 Height (m) Direction Period (s) | ESE 10 | — | S 16 | E 15 | ESE 14 | — | — | S 17 | SSE 9 | NE 12 | ESE 13 | — | S 18 | SE 13 | ESE 13 | SE 13 | SE 13 | ESE 12 | SE 13 | ESE 11 | E 16 |
138 | — | 129 | 4 | 19 | — | — | 6 | 17 | 5 | 35 | — | 25 | 26 | 16 | 27 | 27 | 29 | 6 | 12 | 5 | |
Wind waves Height (m) Direction Period (s) | — | — | NE 3 | WNW 2 | — | NW 4 | N 3 | NW 4 | NW 4 | SSW 9 | — | — | — | — | NNE 3 | WNW 2 | — | NNE 4 | NW 3 | — | NNW 3 |
— | — | 2 | 1 | — | 12 | 11 | 24 | 2 | 505 | — | — | — | — | 1 | 1 | — | 2 | 3 | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 33 | 33 | 3 | 10 | 11 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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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.











