Blacks Reef Surf Break

Lat Long: 39.07° S 177.80° E

Blacks Reef Surf Forecast and Surf Report

Issued: 5 am 26 Aug 2026 (local time)

Forecast update in  hr  min

Today's Blacks Reef sea temperature is
11.8°C
1.8° 

Blacks Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Blacks Reef surf forecast from 25 Aug 2026:

  • Best quality surf: Monday 31 Aug, 3AM (local time) - 13ft (4.0m), 9s period, SSW swell with cross-shore winds.
  • Most powerful swell: Tuesday 1 Sep, 12PM (local time) - 18ft (5.5m), 15s period, S swell with 14,917 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 12PM (local time) - 3.5ft (1.1m), 17s 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 Wednesday (Aug 26) at 12PM. The primary swell is predicted to be 1.1m and 17s period with a secondary swell of 0.4m and 13s. 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 5.5m 15s and forecast to arrive on Tuesday (Sep 01) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Saturday (Aug 29) at 9AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+)12PM (Wed 26th Aug)3.5ft (1.1m) 17s
Best Surf 3AM (Mon 31st Aug)13ft (4.0m) 9s
Most Powerful12PM (Tue 1st Sep)18ft (5.5m) 15s

Table - best surf conditions forecast for Blacks Reef over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s talk about what’s on the menu for the next couple of weeks. We’re looking at a solid run of surf, but it’s got a wild side, so you gotta pick your moments.

The opening act is a beauty. Wednesday morning, the 26th of August, we see a clean 3 ft south swell rolling in with a long 18-second period. The wind is light and cross-offshore from the northwest, making for some really clean lines at Blacks Reef. It’s a reef break, so that long-period groundswell will wrap in nicely here. The water's about average for this time of year, nothing weird to report. The energy is moderate (533), so there’s enough push for a fun session. Wednesday afternoon is even better, going glassy with a 3 ft south swell, period still up at 16 seconds. This is a stand-out window for sure.

Thursday the 27th gets a bit more grunty. The morning is a write-off with a messy cross-onshore wind, but don’t write it off yet. Thursday afternoon is the real deal. The swell jumps to 7 ft from the south, period 17 seconds, and the wind switches to a clean cross-offshore from the east. The energy is pumping (2576), and the report says it’s excellent for experienced surfers. That’s your main call for the week: Thursday afternoon. It’s a powerful, long-period south swell, and this reef will handle it beautifully.

Friday the 28th starts with a clean 5 ft south swell under a moderate offshore breeze from the NNE. That’s a solid morning session, with moderate energy (787). The afternoon drops a bit in size to 4 ft, the wind goes cross-off, and it’s still clean, but the energy drops off.

Saturday the 29th through Sunday the 30th sees the swell fade. Saturday morning has a 3 ft south swell with gentle offshore winds—clean, but small. The energy is weak (265). Sunday is even smaller, barely surfable. We’re looking at a flat spell here.

Then things get interesting, but not for the faint-hearted. Monday the 31st of August is a mess. A strong onshore wind from the southwest and a 13 ft swell with a short 10-second period—that’s a washing machine. The energy is huge (5545), but it’s blown out and ugly. Hard pass.

Tuesday the 1st of September brings a massive 20 ft south swell with a 14-second period. The energy is insane (14499). The wind is light, but the report says the swell is predicted to be too big for this break. This is for experts only, and even then, it’s a gamble. The reef will be a raging torrent. The afternoon has a 15 ft swell under clean cross-offshore winds, but again, it’s huge. If you’re not a pro, stay on the beach.

Wednesday the 2nd of September is the sweet spot comeback. The swell drops to a manageable 7 ft from the south, period 10 seconds, with a light cross-offshore wind from the northwest. The energy is moderate (880), and surf is very clean. That’s your second stand-out window: Wednesday morning. It’s mellowed out from the monster swell, but still has plenty of punch.

From Thursday the 3rd of September onwards, it’s a slow fade. The size drops, and the wind switches around. There are some clean, small waves on the 7th of September (Monday) with a 4 ft south swell and a 11-second period under a light offshore breeze, energy at 650. That’s a nice little session if you’re desperate. The rest of the second week is mostly small, weak, and ordinary. The 10th of September (Thursday) has a clean 2 ft south swell with a 17-second period under a gentle offshore wind, but it’s tiny.

Overall, the big winners are Thursday afternoon the 27th of August for the powerful, clean, 7 ft south swell, and Wednesday morning the 2nd of September for the clean, solid 7 ft south swell after the crazy weekend. The rest is a mix of flat spells, huge and dangerous waves, or small clean bumps. Choose wisely.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Thu morning. Very mild (max 18°C on Wed afternoon, min 11°C on Thu afternoon). Wind will be generally light.

Days 4-6 Weather Summary

Some drizzle, heaviest during Mon night. Very mild (max 16°C on Sat morning, min 9°C on Sat night). Winds increasing (calm on Sun afternoon, fresh winds from the SSW by Mon night).

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
1
3
4
4
3
2
1
2
1
1
0
0
4
!
2
0
!
!
5
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
S
18
1
S
16
0.9
S
17
1.6
S
18
1.8
S
17
1.9
S
15
1.5
S
13
1.3
S
13
1
S
12
0.9
S
12
0.9
S
11
0.7
S
11
0.6
S
11
0.4
S
10
3
SSW
7
3.5
SSW
11
2.5
S
11
1.9
S
14
5.5
S
13
5
S
15
3
S
13
Wave Graph
Metric surfscale
Energy kJ
492
535
443
1561
1881
1679
780
534
290
213
202
119
81
31
1055
2996
1595
1383
9567
12416
3387
Wind (km/h)
10
NW
0
ENE
20
NW
10
S
10
E
20
NNE
15
NNE
15
NNW
20
N
15
N
20
NNW
10
NW
15
WNW
20
SSW
10
NW
20
WSW
10
WSW
25
WSW
20
SSW
5
ESE
15
NNW
Wind State
cross-off
glassy
cross-off
on
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
on
cross-off
cross-on
cross-on
cross-on
on
glassy
cross-off
High Tide
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
7:44AM1.59m
8:05PM1.66m
8:29AM1.65m
8:52PM1.69m
Low Tide
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
1:48PM0.24m
2:20AM0.23m
2:37PM0.24m
clear
part cloud
part cloud
light rain
cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
clear
clear
clear
clear
clear
part cloud
rain showers
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:39
6:37
6:35
6:35
6:33
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:39
5:40
5:42
5:43
5:44
5:45
5:45
 mm
1
1
Temp °C
16
18
15
12
11
11
16
17
15
16
16
13
14
15
12
15
15
13
10
11
11
Feels °C
14
16
11
10
9
8
12
14
12
13
12
11
10
11
7
10
12
9
5
9
7
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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