
Surf Forecasts:
Blacks Reef surf forecast from 12 Sep 2026:
- Best quality surf: Monday 14 Sep, 3AM (local time) - 8ft (2.4m), 12s period, S swell with glassy winds.
- Most powerful swell: Sunday 13 Sep, 6AM (local time) - 8ft (2.5m), 15s period, S swell with 3,081 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 3AM (local time) - 8ft (2.4m), 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 Monday (Sep 14) at 3AM. The primary swell is predicted to be 2.4m and 12s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Blacks Reef in the next 16 days are 2.5m 15s and forecast to arrive on Sunday (Sep 13) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Friday (Sep 18) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 14th Sep) | 8ft (2.4m) 12s |
| Best Surf | 3AM (Mon 14th Sep) | 8ft (2.4m) 12s |
| Most Powerful | 6AM (Sun 13th Sep) | 8ft (2.5m) 15s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
Alright, this is Rusty here, and I’m looking at what’s on the table for Blacks Reef. It’s a familiar spot, a reef break that's exposed to the south, and right off the bat, the water temp here is running about average for the time of year, so nothing weird to report there.
The pattern starts off a bit funky. Sunday (Sept 13) is a write-off — we’ve got a solid 8ft to 8ft S/SSW swell pushing through but it’s coming with a cross-onshore wind that’s got the surface chopped right up. The combined energy is strong (2289 to 3756), but with that wind and a high tide issue, it’s not one for the paddle. Honestly, with that setup, a kiter might be having more fun.
Monday (Sept 14) is where it starts to get interesting. Morning comes in with glassy conditions and a 7ft south swell at 12 seconds. That’s a proper groundswell, moderate energy (1315 combined), and with an offshore breeze from the ENE, the faces are going to be clean. This one’s for experienced surfers, as the size is pushing the edge for beginners, but the quality is there. The afternoon holds up clean with a 6ft south swell and a light cross-off breeze.
Tuesday (Sept 15) sees the swell dropping off to 4ft. It’s still clean with a light offshore, but the energy is stepping down (447 combined). It’s surfable, just not the standout.
We get a lull through Wednesday and Thursday (Sept 16-17) where the waves shrink to under 3ft. The energy is low (under 130 combined), and the surf is very ordinary. There is a couple of glassy windows on the Thursday afternoon and Friday morning, but the swell is just too small to get excited about.
The best on offer looks like Friday morning (Sept 18). The swell bumps back up to 4ft from the SE, period at 13 seconds, and the combined energy is solid at 520. It’s glassy, clean, and the wind is from the NNE at just 3 mph. That’s a proper window for Blacks Reef. The crowd potential is there — this spot can get busy — so get in early.
Saturday (Sept 19) turns ugly. Strong cross-onshore and onshore winds with a short-period 7ft S swell that’s just messy. Not one to bother with.
Sunday (Sept 20) morning has a small clean window with a 3ft SSW groundswell (14sec period), worth a look if you’re keen to get wet, but it’s marginal.
Then we hit a bit of a gap. Monday through to Thursday (Sept 21-24) is a mix of poor surf and strong winds, with one standout exception: Thursday morning (Sept 24) has a 10ft S swell but with fresh cross-onshore winds making it lumpy and dangerous — experts only, and even then it’s not pretty.
The second standout is Friday morning (Sept 25). We get a glassy, dead-calm start with a 8ft S swell (8-second period). The combined energy is 932, and the wind is zero — dead glass. It’s a short-period swell, so expect it to be a bit crumbly at a reef, but with those conditions, the waves will be breaking clean. Bigger side, so not for the faint of heart.
The last few days (Sept 26-28) see the swell dropping back with a mix of long-period energy (16-21 seconds) but with cross-shore winds and moderate combined energy. It’s marginal but surfable if you pick your window.
Overall, Monday (Sept 14) morning and Friday (Sept 25) morning are the true standouts. Clean, solid size, and the right wind. Get on it.
- Rusty
Short Range ForecastMostly dry. Very mild (max 15°C on Tue morning, min 8°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Fri morning. Very mild (max 16°C on Wed morning, min 9°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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 15 | S 15 | SSW 14 | S 12 | S 12 | S 13 | S 12 | S 11 | S 10 | S 9 | SSE 9 | SSE 9 | SE 8 | SE 11 | SE 10 | SE 15 | SE 13 | SE 12 | SE 12 |
Wave Graph | |||||||||||||||||||
4201 | 2289 | 2202 | 1520 | 1311 | 1127 | 699 | 389 | 296 | 175 | 106 | 77 | 57 | 92 | 79 | 309 | 488 | 392 | 236 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | cross-on | cross-on | glassy | cross-off | off | off | cross-off | cross-off | glassy | cross-off | cross | cross-off | off | off | glassy | glassy | cross-off |
High Tide | 6:56AM1.71m | 7:15PM1.74m | 7:45AM1.75m | 8:04PM1.73m | 8:30AM1.77m | 8:52PM1.71m | 9:14AM1.76m | 9:39PM1.68m | 9:58AM1.72m | 10:25PM1.64m | 10:45AM1.66m | 11:11PM1.59m | |||||||
Low Tide | 00:45AM0.17m | 1:02PM0.18m | 1:33AM0.22m | 1:52PM0.24m | 2:19AM0.27m | 2:43PM0.29m | 3:05AM0.33m | 3:31PM0.34m | 3:51AM0.39m | 4:19PM0.39m | 4:38AM0.42m | 5:05PM0.42m | |||||||
— | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | |
— | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 10 | 13 | 13 | 11 | 12 | 12 | 10 | 15 | 15 | 12 | 16 | 16 | 13 | 16 | 16 | 13 | 13 | 15 | 11 |
Feels °C | 9 | 9 | 8 | 8 | 11 | 9 | 8 | 12 | 11 | 9 | 14 | 13 | 11 | 13 | 14 | 10 | 12 | 14 | 7 |
Swell 1 Height (m) Direction Period (s) | S 15 | S 15 | S 14 | S 12 | S 12 | S 13 | S 12 | S 11 | S 10 | S 9 | SSE 9 | SSE 9 | SE 8 | SE 11 | SE 10 | SE 15 | SE 13 | SE 12 | SE 12 |
4201 | 2289 | 1553 | 1520 | 1311 | 1127 | 699 | 389 | 296 | 175 | 106 | 77 | 57 | 92 | 79 | 309 | 488 | 392 | 236 | |
Swell 2 Height (m) Direction Period (s) | ENE 12 | ENE 12 | ENE 12 | ENE 12 | E 12 | E 12 | E 13 | S 16 | SSW 16 | NE 5 | ENE 4 | SSW 13 | SSW 8 | S 8 | SSW 16 | SE 9 | SSW 6 | SSW 6 | ENE 6 |
30 | 14 | 14 | 14 | 3 | 3 | 13 | 44 | 47 | 13 | 2 | 17 | 14 | 5 | 24 | 55 | 8 | 7 | 49 | |
Swell 3 Height (m) Direction Period (s) | — | ENE 8 | E 9 | NE 9 | E 9 | E 8 | NE 11 | E 13 | ENE 13 | S 15 | S 14 | E 12 | SSW 13 | S 14 | S 8 | NE 4 | S 18 | S 17 | SSW 6 |
— | 7 | 1 | 3 | 1 | 1 | 5 | 14 | 17 | 17 | 15 | 3 | 17 | 16 | 5 | 2 | 24 | 49 | 13 | |
Wind waves Height (m) Direction Period (s) | — | — | SSW 14 | — | — | — | — | — | ENE 3 | NNE 5 | — | — | — | WNW 2 | ENE 4 | NNE 4 | NE 3 | NE 5 | — |
— | — | 2202 | — | — | — | — | — | 10 | 27 | — | — | — | 1 | 1 | 5 | 4 | 51 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 3 | 162 | 3 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 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.










