Sponge bay Surf Break

Lat Long: 38.70° S 178.06° E

Sponge bay Surf Forecast and Surf Report

Issued: 5 pm 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Sponge bay sea temperature is
12.9°C
1.1° 

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


Sponge bay surf forecast from 10 Sep 2026:

  • Best quality surf: Sunday 13 Sep, 3AM (local time) - 6ft (1.8m), 16s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Sunday 13 Sep, 3AM (local time) - 6ft (1.8m), 16s period, SSE swell with 1,592 kJ wave energy.
  • Next surfable swell (1★+): Thursday 10 Sep, 9PM (local time) - 2ft (0.6m), 7s period with ESE swell.

Best Forecast Surf Conditions for Sponge bay this week:

The surf forecast for Sponge bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 10) at 9PM. The primary swell is predicted to be 0.6m and 7s period with a secondary swell of 0.2m and 16s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Sponge bay in the next 16 days are 1.8m 16s and forecast to arrive on Sunday (Sep 13) 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 0.6m 8s period and expected on Friday (Sep 11) at 6PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Thu 10th Sep)2ft (0.6m) 7s
Best Surf 3AM (Sun 13th Sep)6ft (1.8m) 16s
Most Powerful 3AM (Sun 13th Sep)6ft (1.8m) 16s

Table - best surf conditions forecast for Sponge bay over the next 16 days.


The Lowdown

Alright, Rusty here. Let's have a look at what Sponge Bay has in store for us over the next couple of weeks.

Right off the bat, the next few days are a bit of a write-off. We've got small, weak swell with onshore or cross-off winds, and the forecast is calling it poor. The energy is barely there – just 60 (combined energy) on Thursday the 10th. The water’s sitting at 55°, which is a bit colder than normal for this time of year, so you’ll want a good wetsuit.

The first real glimmer of hope shows up on Sunday, September 13th. There's a clean, long-period groundswell pushing in from the SSE. Early morning, we’re looking at a solid 6ft with a 15-second pulse and light cross-offshore winds. The wave energy jumps right up to 1580. This is proper, powerful surf, but it’s going to be too big for beginners. For the experienced crew, the morning session is the standout – clean lines, plenty of push. Watch out for the afternoon though, the wind swings onshore, turning it ugly.

On Monday the 14th, the swell backs off a touch to 4ft, but the wind turns offshore and light. The SSE swell is still hanging around with an 11 to 12-second period. It’s clean, it’s rideable, and the vibe will be good. Not as punchy as Sunday, but a much more manageable size for a bigger range of surfers. The energy is moderate at around 422.

After that, the wave heights drop back way down into the knee-to-waist high range for most of the following week. The conditions are clean but there’s just no real grunt in the waves. The longest period swells start popping up again from the 18th onwards, up to 18 seconds, but the heights are tiny, so you’ll be scratching for anything with a face.

Now, looking ahead to the second week, there’s a wild card on Monday, September 21st. The models are showing a massive 13ft SE swell hitting with clean offshore winds. The energy reading is off the charts at 3780. That’s huge, heavy water. The forecast even says it’s too big for this spot. That one is strictly for the elite, if anyone even wants to paddle out into that. The confused, messy wind days that follow on the 22nd and 23rd with 16ft swell and fresh onshores aren't worth thinking about.

So, for the whole outlook, that Sunday morning on the 13th is your best window. Get out there early. The following Monday the 14th is a solid backup if you want something a bit tamer.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Sat morning. Very mild (max 16°C on Thu afternoon, min 8°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 17°C on Tue afternoon, min 9°C on Sun night). Wind will be generally light.

Thu
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
0
1
0
0
3
4
0
1
2
2
1
1
1
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SE
7
0.3
SSE
16
0.3
SSE
19
0.5
S
18
0.4
SSE
18
0.4
SSE
17
0.8
SSE
16
1.6
SSE
15
1.7
SSE
15
1.9
S
14
1.4
SSE
13
1.4
SSE
11
1.2
SSE
13
0.9
SSE
12
0.8
SSE
11
0.7
SSE
10
0.6
SSE
9
0.4
SE
9
0.3
SSE
9
0.2
S
13
Wave Graph
Metric surfscale
Energy kJ
44
48
72
169
102
95
359
1133
1358
1443
653
495
454
211
133
92
59
21
17
14
Wind (km/h)
10
WNW
10
W
20
SSW
10
ESE
15
WNW
20
SW
15
SSE
15
N
10
W
25
S
10
W
10
N
15
N
15
NW
10
WNW
10
E
25
WNW
25
NW
20
NW
20
SW
Wind State
cross-off
cross-off
on
cross
cross-off
cross-on
cross-on
off
cross-off
on
cross
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
High Tide
5:18PM1.94m
5:44AM1.88m
6:09PM2.01m
6:33AM1.95m
6:53PM2.05m
7:17AM1.99m
7:34PM2.05m
8:00AM2.01m
8:14PM2.02m
8:43AM2.00m
8:56PM1.97m
9:25AM1.96m
9:40PM1.91m
Low Tide
11:34PM0.55m
11:50AM0.46m
00:26AM0.48m
12:37PM0.42m
1:10AM0.44m
1:23PM0.42m
1:52AM0.42m
2:08PM0.44m
2:32AM0.43m
2:52PM0.48m
3:13AM0.47m
3:37PM0.54m
cloud
part cloud
part cloud
part cloud
clear
rain showers
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:15
6:13
6:11
6:09
6:09
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:53
5:54
5:54
5:55
5:57
5:58
 mm
1
1
Temp °C
16
12
11
12
11
12
12
10
14
13
11
12
14
13
15
17
14
17
18
12
Feels °C
13
9
6
9
8
7
8
7
8
7
8
8
10
10
13
15
9
11
14
9
  • 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 Sponge bay Surf forecast

The above surf forecast table for Sponge bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sponge bay can be found by selecting the local surf guide option on the grey menu. Our Sponge bay 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 (Sponge bay) 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 Sponge bay 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.

Are you planning a holiday in Gisborne and Mahia? If you are looking for accommodation near Sponge bay, camping, hotels and holiday cottages in Gisborne and Mahia, consider staying in Gisborne which is 8 km (5 miles) away.

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