Sponge bay Surf Break

Lat Long: 38.70° S 178.06° E

Sponge bay Surf Forecast and Surf Report

Issued: 5 am 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Sponge bay sea temperature is
13.0° C
1.2° 

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 30 Jul 2026:

  • Best quality surf: Sunday 2 Aug, 3AM (local time) - 11ft (3.5m), 13s period, S swell with cross-onshore winds.
  • Most powerful swell: Sunday 2 Aug, 3AM (local time) - 11ft (3.5m), 13s period, S swell with 3,829 kJ wave energy.
  • Next surfable swell (1★+): Sunday 2 Aug, 3AM (local time) - 11ft (3.5m), 13s period with S 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 Sunday (Aug 02) at 3AM. The primary swell is predicted to be 3.5m and 13s period with a secondary swell of 2.2m and 13s. Another secondary swell of 0.1m and 16s is also forecast. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Sponge bay in the next 16 days are 3.5m 13s and forecast to arrive on Sunday (Aug 02) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 7s period and expected on Friday (Jul 31) at 9AM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 2nd Aug)11ft (3.5m) 13s
Best Surf 3AM (Sun 2nd Aug)11ft (3.5m) 13s
Most Powerful 3AM (Sun 2nd Aug)11ft (3.5m) 13s

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


The Lowdown

Alright, this is Rusty, comin' to you from the beach. Let's have a look at what's on the cards for Sponge Bay over the next couple of weeks.

Right off the bat, I gotta be straight with you – the first few days of this run are a bit of a write-off. The swell does show up, but the wind is just all wrong, making a mess of things. We're looking at a few days of poor conditions to start with, so don't bother paddling out on Friday the 31st of July or Saturday the 1st of August. The wind is just too strong and onshore, pushing the swell into a choppy, lumpy mess. It's a real shame because the wave energy on Saturday is actually massive, with a combined energy value of 1218, but it's not gonna be any fun to surf.

We get a bit of a breather on Sunday the 2nd of August. The swell drops to around 7ft from the SSE with a period of 12 seconds, but the wind is still messy. The morning is a cross-shore, and the afternoon has onshore wind. It's a marginal call at best, with a bit of a score but nothing to get excited about.

Monday the 3rd of August is the first real sniff of something decent. The swell is small, about 3ft from the SSE, but the real highlight is the glassy conditions in the afternoon with a slight air. The combined energy is low at 205, so it's just surfable waves, but for a beginner or someone wanting a quiet paddle on a small board, that glassy afternoon session is your best bet in the first week. It's the only time the conditions and swell come together to make something clean.

Then we get another rough patch. The wind swings onshore again from Tuesday the 4th of August right through to Thursday the 6th of August, with more lumpy, choppy, and frankly poor surf. The swell is big again, but it's just ugly.

Now, Friday the 7th of August is a tease. The swell drops right down to 3ft, but the wind is light and offshore, making it clean. The energy is weak at 131, so it's a very small wave day, but if you’ve got a log, you might get a few little peelers. Not a standout.

But hold onto your board, because the real standout is shaping up for Saturday the 8th of August. The morning session is looking like the best on offer in the whole forecast. We’ve got a solid 10ft swell from the SE with a very long period of 15 seconds, and the wind is a clean offshore breeze from the ENE. The combined energy is a massive 5238, which is a lot of power. This is a big, powerful groundswell. The long period means it'll be perfect for the point, reef, or river mouth, but at a beach-and-reef set-up like Sponge Bay, it might break a bit straight. It's predicted to be too big for this break, meaning it's expert territory only. For the experienced crew, this is the one to circle. The afternoon is a bit of a letdown with the wind swinging onshore, so get it in the morning.

From Sunday the 9th of August onwards, it's a wild ride. We get another massive swell arriving, but it's accompanied by howling winds. The weekend of the 9th and 10th of August sees huge swell, 13ft to 15ft from the E, with the wind and tide favorable, but again, it's just too big for Sponge Bay. The energy is incredibly strong, hitting 5538 and 6340. This is for the absolute elite only, if it's even rideable. The crowds are said to be "sometimes" here, so on a day like this, you might have it to yourself, but the risk is massive.

The middle of the week from the 11th to the 14th of August keeps the big swell, 7ft to 15ft, but the wind is strong and cross-shore, keeping it lumpy and messy. The energy is still high, but the quality isn't there for a good paddle. The best of those days might be the 13th and 14th of August, when the wind is offshore, but it's a strong breeze, making it a battle just to get out. The swell is still big at 7ft, so it's a lot of work for some messy waves.

The final day, Saturday the 15th of August, the swell drops back to 5ft, but the wind is a strong offshore breeze, making it clean but likely blown out and small. The energy is only 561, so it's not gonna be a classic.

So, to wrap it up: The standout is the morning of Saturday the 8th of August. That's a big, powerful, clean swell for the experts. The only other real window for a clean, small wave is the glassy afternoon of Monday the 3rd of August. The rest of the period is a mix of too big, too windy, or both. Keep an eye on the charts, but it's a pretty average run for Sponge Bay.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Fri morning. Very mild (max 15°C on Fri morning, min 6°C on Sat night). Winds decreasing (fresh winds from the SSW on Sat afternoon, calm by Sun afternoon).

Days 4-6 Weather Summary

Some drizzle, heaviest during Mon night. Very mild (max 16°C on Mon afternoon, min 6°C on Wed night). Winds increasing (calm on Mon afternoon, fresh winds from the SSW by Mon night).

Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
2
1
1
0
1
0
0
1
0
0
0
3
3
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
ESE
11
0.7
ESE
11
0.6
ESE
11
2.2
SSW
8
2.5
SSE
11
2.3
SSE
13
2
SSE
12
1.7
SSE
11
1.1
SE
11
1.1
SE
10
0.9
SSE
10
0.6
SE
10
1.2
SSE
15
2.5
SSE
15
2.3
SSE
15
1.9
SSE
14
2
SSE
15
1.8
SSE
13
1.5
SSE
12
1.3
SSE
11
1.2
SE
11
Wave Graph
Metric surfscale
Energy kJ
164
126
95
699
1546
1820
1080
669
268
243
175
76
596
2983
2292
1415
1739
1028
647
426
347
Wind (km/h)
15
NW
20
NW
15
WNW
30
SW
35
SSW
30
SW
15
W
15
S
15
NW
20
WNW
5
S
20
WNW
30
SSW
20
SW
25
SW
30
SW
25
SW
10
WNW
10
WNW
15
SSE
10
NW
Wind State
cross-off
cross-off
cross-off
cross-on
cross-on
cross-on
cross
on
cross-off
cross-off
glassy
cross-off
cross-on
cross-on
cross-on
cross-on
cross-on
cross-off
cross-off
cross-on
cross-off
High Tide
7:44PM1.87m
7:57AM1.82m
8:24PM1.93m
8:38AM1.87m
9:03PM1.97m
9:19AM1.89m
9:43PM1.98m
10:00AM1.91m
10:23PM1.98m
10:42AM1.92m
11:05PM1.95m
11:28AM1.91m
11:47PM1.92m
Low Tide
1:20PM0.65m
2:00AM0.69m
2:02PM0.60m
2:41AM0.63m
2:43PM0.56m
3:20AM0.58m
3:24PM0.54m
4:00AM0.54m
4:05PM0.52m
4:41AM0.50m
4:47PM0.51m
5:24AM0.47m
5:31PM0.52m
rain showers
clear
clear
rain showers
rain showers
part cloud
clear
clear
clear
clear
clear
rain showers
cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:11
7:09
7:09
7:07
7:07
7:05
7:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:16
5:17
5:19
5:20
5:20
5:21
5:22
 mm
1
1
1
1
Temp °C
15
15
12
8
9
9
10
11
9
14
16
12
10
10
8
8
9
7
9
9
7
Feels °C
10
10
7
1
1
1
7
6
4
11
14
7
3
5
3
1
2
3
6
5
3
  • Map Icons:
  • Break
  • 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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