Ruby Bay Surf Break

Lat Long: 41.21° S 173.09° E

Ruby Bay Surf Forecast and Surf Report

Issued: 11 pm 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Ruby Bay sea temperature is
12.9°C
0.5° 

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


Ruby Bay surf forecast from 5 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 9PM (local time) - 5ft (1.6m), 7s period, N swell with glassy winds.
  • Most powerful swell: Sunday 6 Sep, 9PM (local time) - 5ft (1.6m), 7s period, N swell with 279 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 9PM (local time) - 5ft (1.6m), 7s period with N swell.

Best Forecast Surf Conditions for Ruby Bay this week:

The surf forecast for Ruby Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 06) at 9PM. The primary swell is predicted to be 1.6m and 7s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Ruby Bay in the next 16 days are 1.6m 7s and forecast to arrive on Sunday (Sep 06) at 9PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Sunday (Sep 06) at 6PM.

Wave TypeTime (NZST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sun 6th Sep)5ft (1.6m) 7s
Best Surf 9PM (Sun 6th Sep)5ft (1.6m) 7s
Most Powerful 9PM (Sun 6th Sep)5ft (1.6m) 7s

Table - best surf conditions forecast for Ruby Bay over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s take a good, hard look at what’s on the menu for the next couple of weeks. I gotta be straight with you – this one’s a tough pill to swallow. We’re looking at a long, quiet stretch, so don’t be in a hurry to wax up.

The whole forecast period is a real bummer, starting with a big fat gap of no surf worth mentioning. From now until about the morning of the 10th of September, you’re basically out of luck. There’s just no energy in the water. The first hint of something, and I use that word loosely, shows up Thursday morning the 10th at Ruby Bay. We’ll see a weak 4ft swell out of the NW with a short, weak period of 6 seconds, and combined swell energy is a meager 85. The wind will be offshore from the SW though, so the surface will be clean. But honestly, that’s a tiny, weak wave for a spot that rarely breaks. Don't get your hopes up.

That little blip fades fast, and then we’re back into another dead zone. From the afternoon of the 10th right through to the end of the outlook on the 21st, it’s almost entirely flat. You’ll see some offshore winds and glassy conditions, but with wave heights barely registering and combined energy values down in the single digits or low teens, there’s nothing to ride. A 0.3ft, 15-second period groundswell shows up on the morning of the 15th, but that’s a phantom – it’s way too small to do anything. It’s just a tease.

For a spot like Ruby Bay, which is a sheltered point and rarely breaks, a blank run like this is pretty normal. It’s not a place you check every day. The best advice I can give you is to wait and see if the long-range forecasts change. Things can shift, but for now, save the gas and keep the board in the car. There are no standouts here, not even close. The water temp is about average for the time of year, so no surprises there.

Rusty, signing off.

Short Range Forecast

Heavy rain (total 35mm), heaviest during Sun afternoon. Very mild (max 14°C on Sun night, min 5°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 14°C on Wed afternoon, min 4°C on Thu night). Wind will be generally light.

Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
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
0
0
0
0
0
0
0
0
0
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)
1.5
NW
6
1
NNW
5
1.6
NNW
6
1.4
N
7
0.9
N
8
0.6
N
9
0.4
N
9
0.4
N
8
0.4
N
8
0.3
N
8
0.2
N
8
0.1
N
20
0.1
N
7
1.1
NW
6
0.5
N
6
0.2
NNW
20
0.5
NW
19
0.4
NNW
18
0.4
NW
18
Wave Graph
Metric surfscale
Energy kJ
0
60
0
206
97
52
25
22
22
12
5
8
1
79
0
0
0
0
0
Wind (km/h)
5
WNW
5
WNW
5
NNW
5
NE
10
S
5
SW
5
S
5
SSW
10
NNE
5
SSW
0
SW
0
NNE
10
SW
10
SW
5
NNW
15
SW
10
WSW
10
W
20
WSW
Wind State
cross-off
glassy
glassy
on
cross-off
off
glassy
glassy
cross-on
glassy
glassy
glassy
off
off
glassy
off
off
cross-off
off
High Tide
4:28AM3.25m
5:21PM3.15m
5:57AM3.23m
7:12PM3.34m
7:19AM3.38m
8:17PM3.67m
8:24AM3.62m
9:03PM3.96m
9:17AM3.86m
9:44PM4.16m
10:02AM4.05m
10:21PM4.27m
Low Tide
10:10PM1.53m
10:24AM1.54m
11:47PM1.50m
12:02PM1.52m
1:06AM1.29m
1:28PM1.32m
2:06AM1.00m
2:31PM1.06m
2:55AM0.74m
3:19PM0.82m
3:36AM0.56m
3:59PM0.65m
rain showers
light rain
mod rain
heavy rain
mod rain
light rain
part cloud
cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:43
6:41
6:39
6:37
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:08
6:09
6:10
6:12
 mm
1
1
9
17
6
1
Temp °C
12
12
12
14
8
8
7
11
11
8
12
14
9
13
13
6
13
11
10
Feels °C
10
11
12
13
6
6
5
9
8
6
10
13
7
10
10
1
9
9
4
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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 Ruby Bay Surf forecast

The above surf forecast table for Ruby Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ruby Bay can be found by selecting the local surf guide option on the grey menu. Our Ruby 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 (Ruby 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 Ruby 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 Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away

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