Blacks Reef Surf Break

Lat Long: 39.07° S 177.80° E

Blacks Reef Surf Forecast and Surf Report

Issued: 11 pm 04 Sep 2026 (local time)

Forecast update in  hr  min

Today's Blacks Reef sea temperature is
12.9°C
0.8° 

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 4 Sep 2026:

  • Best quality surf: Saturday 12 Sep, 12AM (local time) - 4ft (1.2m), 12s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Saturday 12 Sep, 3AM (local time) - 3.5ft (1.1m), 18s period, S swell with 777 kJ wave energy.
  • Next surfable swell (1★+): Saturday 5 Sep, 6AM (local time) - 1.5ft (0.5m), 7s period with SSW 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 Saturday (Sep 05) at 6AM. The primary swell is predicted to be 0.5m and 7s period with a secondary swell of 0.3m and 9s. 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 1.1m 18s and forecast to arrive on Saturday (Sep 12) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Monday (Sep 07) at 12PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sat 5th Sep)1.5ft (0.5m) 7s
Best Surf12AM (Sat 12th Sep)4ft (1.2m) 12s
Most Powerful 3AM (Sat 12th Sep)3.5ft (1.1m) 18s

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


The Lowdown

Alright, Rusty here. Let’s get into it.

We’ve only got one spot on the cards for the next couple of weeks: Blacks Reef. Don’t get too excited just yet, because for the first few days, it’s pretty quiet. You’re looking at small, weak swell from the south, with combined wave energy barely cracking 100 early on. The water’s sitting at 55°F, which is pretty much what you’d expect for this time of year – no major surprises there.

Friday the 4th and Saturday the 5th are nothing to write home about. Tiny waves, 2ft to 2ft, with short periods, and the wind is all over the place. It’s not blown out, but it’s not clean either. Just small, messy, and frustrating. Sunday the 6th tries to pick up a bit with a longer period groundswell from the SSW, but the height drops to 1ft in the afternoon, so even though the energy bumps up to 129, you’re still mostly looking at closeouts. Monday the 7th has some clean-ish offshore mornings with 0.9ft waves, but honestly, that’s a pool toy kind of day.

Tuesday the 8th and Wednesday the 9th are a mixed bag. Swell picks up Wednesday morning with 6ft at 9 seconds from the south, pushing energy to 569, but the wind is cross-onshore, making for lumpy conditions. Not great, but there’s a bit more push. Thursday the 10th is the first real glimpse of hope – glassy conditions, 3ft, clean, but still small. A longboarder’s dream, maybe.

Now, here’s where it gets interesting. The 16th of September... hold onto your board. Wednesday afternoon sees a massive 13ft S swell rolling in with a 16-second period, and the energy reading is an insane 8448. The problem? It’s too big for Blacks Reef. The forecast flat out says it. This is expert-only territory, and even then, it could be a washing machine. The wind is light and onshore, but the sheer size makes this a “watch from the cliff” kind of day.

The true standout? Thursday morning, September 17th. This is the one. The swell drops to a still-chunky 10ft from the south, with a 14-second period, and it goes glassy – zero wind. The energy is still massive at 3617. This is the kind of day you call in sick for. Blacks Reef is an exposed reef break; it takes that long-period south groundswell beautifully. These waves will have power, shape, and clean faces. It’s for experienced surfers only, no question. The optimum swell direction here is south, and that’s exactly what you’re getting. Expect a crowd – it’s “often” busy, and with conditions like this, it’ll be a local’s lineup.

Friday the 18th and Saturday the 19th ease off but still offer solid waves. Friday morning has 5ft, 11-second south swell, clean, with light offshore winds. Saturday afternoon on the 19th is a nice capper: 4ft but with a 14-second period and light offshore winds, producing excellent, clean waves for experienced surfers.

So bottom line: the first week is a write-off. Small, weak, and average. But hold out for the 17th. That’s your day. Glassy, solid south swell, and a reef setup that’ll love it. Just make sure you’re ready for the size.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Mon morning, min 9°C on Fri night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 16°C on Thu afternoon, min 8°C on Tue night). Wind will be generally light.

Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
1
1
0
0
1
1
1
0
0
0
0
0
1
0
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
S
10
0.7
SSW
8
0.8
SSW
8
0.6
S
12
0.7
SSW
10
0.4
SSW
18
0.5
S
17
0.3
SSW
16
0.4
SSW
10
0.9
S
7
0.6
SSE
7
0.5
S
11
1.9
SSW
9
1.6
S
9
1.4
S
8
1.1
S
8
0.9
S
8
0.7
S
8
2.2
SSW
6
Wave Graph
Metric surfscale
Energy kJ
29
68
81
110
102
104
147
51
32
88
36
58
547
421
283
157
92
54
369
Wind (km/h)
15
WNW
10
W
15
ENE
15
WNW
15
NNW
15
NNW
15
NNW
10
N
15
NNE
10
NNW
15
W
25
SW
20
SW
15
SW
10
SSE
10
N
15
WNW
10
NW
40
WSW
Wind State
cross
cross
cross-off
cross
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross
on
on
cross-on
cross-on
cross-off
cross
cross-off
cross-on
High Tide
11:22PM1.67m
11:46AM1.74m
00:17AM1.65m
12:46PM1.73m
1:15AM1.63m
1:45PM1.73m
2:15AM1.61m
2:43PM1.74m
3:14AM1.61m
3:41PM1.74m
4:12AM1.62m
4:37PM1.75m
Low Tide
5:34AM0.23m
6:09PM0.23m
6:29AM0.21m
7:08PM0.21m
7:26AM0.19m
8:07PM0.18m
8:26AM0.16m
9:05PM0.15m
9:27AM0.13m
10:02PM0.13m
10:25AM0.11m
10:59PM0.13m
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
cloud
cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:24
6:22
6:20
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:49
5:50
5:51
5:52
5:52
5:53
 mm
9
Temp °C
14
14
15
12
17
17
15
18
17
13
13
12
11
11
11
10
15
16
12
Feels °C
9
12
11
8
13
13
11
15
14
10
9
7
7
7
7
7
13
13
7
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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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