
Surf Forecasts:
Ruby Bay surf forecast from 15 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 9AM (local time) - 5ft (1.5m), 7s period, N swell with 193 kJ wave energy.
Best Forecast Surf Conditions for Ruby Bay this week:
The most powerful waves expected at Ruby Bay in the next 16 days are 1.5m 7s and forecast to arrive on Thursday (Sep 17) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Saturday (Sep 19) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9AM (Thu 17th Sep) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here again, this time in feet and miles. Gotta level with ya – it’s a grim stretch ahead. We’re lookin’ at a long, flat dry spell before we see anythin’ worth paddlin’ out for.
Right now through the 16th, it’s a dead zone. A tiny bump on Wednesday the 16th morning shows a 0.3ft ripple from the N with a period of 6 seconds and energy of just 1 – that’s barely a ripple. Wednesday afternoon gets a little better: a 3ft NNW swell at 5 seconds, energy of 40, but still tagged as poor conditions. Not worth the wetsuit.
Your one and only real standout is Thursday the 17th morning at Ruby Bay. We get a 5ft swell from the N, period of 7 seconds, and the combined energy jumps to 193 – that’s moderate, meaty energy for a spot that’s usually sheltered. Winds are glassy, so it’ll be smooth as glass. Water temp is 55°, average for this time of year, nothin’ weird. Now, Ruby Bay is a point break that “rarely breaks,” so the fact it’s showin’ up is a big deal. The swell direction is N, and that’s exactly what this spot likes. For a beginner break, 5ft might be a handful, but if you’ve got some experience, Thursday morning is your golden hour. Crowds are possible – it says “sometimes,” so expect a few others with the same idea.
After that, it’s downhill. Thursday afternoon drops to 3ft with a cross-off wind from the W at 12 mph, energy down to 70. Friday the 18th gives a 1ft morning and a 0.7ft afternoon – both weak. Saturday and Sunday are flat. There’s a tiny 3ft bump on Sunday the 20th afternoon from the NE at 4 seconds, but that’s junky.
The second week is just as barren. A 3ft NW swell on Monday the 22nd afternoon with offshore wind, but energy is only 25. The rest is flat or near-flat all the way through the end of the month. A 1ft ripple on the 30th afternoon is about the best you’ll see.
So take it from me: if you’re itchin’ to surf, Thursday the 17th morning is your only real shot. Otherwise, it’s a long, flat wait.
Rusty
Short Range ForecastModerate rain (total 19mm), heaviest on Wed night. Very mild (max 16°C on Tue afternoon, min 4°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Sun morning, min 6°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | NW 15 | NW 15 | NNW 5 | N 6 | NNW 5 | NNW 5 | N 7 | N 7 | N 7 | N 7 | N 7 | NNW 16 | NNW 15 | NW 6 | NNW 16 | NNW 8 | NE 4 | NNE 4 | NNW 15 | NW 6 | NW 6 |
Wave Graph | |||||||||||||||||||||
0 | 0 | 0 | 1 | 40 | 43 | 193 | 70 | 27 | 17 | 4 | 0 | 0 | 0 | 0 | 0 | 15 | 2 | 0 | 0 | 58 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | off | cross-off | glassy | cross-on | glassy | cross-off | off | off | off | off | glassy | cross-off | off | off | glassy | glassy | off | glassy | off |
High Tide | 12:27PM4.03m | 00:40AM3.90m | 1:00PM3.88m | 1:16AM3.67m | 1:33PM3.69m | 1:56AM3.41m | 2:10PM3.48m | 2:45AM3.16m | 2:53PM3.23m | 3:50AM2.98m | 3:58PM3.01m | 5:13AM2.93m | 5:51PM2.93m | ||||||||
Low Tide | 6:05PM0.86m | 6:32AM0.93m | 6:37PM1.08m | 7:08AM1.14m | 7:12PM1.33m | 7:47AM1.37m | 7:57PM1.58m | 8:35AM1.59m | 9:04PM1.80m | 9:36AM1.77m | 10:42PM1.89m | 10:58AM1.83m | 00:12AM1.83m | ||||||||
6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | |
— | 6:15 | — | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — | — | 6:20 | — | — | 6:21 | — | — | 6:22 | — | |
mm | — | — | — | — | — | 14 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 10 | 15 | 16 | 11 | 12 | 13 | 6 | 13 | 14 | 10 | 12 | 13 | 11 | 16 | 15 | 9 | 16 | 17 | 12 |
Feels °C | 13 | 14 | 7 | 12 | 14 | 9 | 9 | 8 | 3 | 9 | 9 | 7 | 11 | 9 | 9 | 12 | 13 | 7 | 14 | 15 | 10 |
Swell 1 Height (m) Direction Period (s) | NW 15 | NW 15 | NNW 5 | NNW 4 | — | — | NW 16 | N 7 | N 7 | N 7 | NW 15 | NW 4 | NW 4 | NW 5 | NNW 5 | NNW 8 | NW 14 | NW 15 | NNW 15 | NW 6 | NNW 5 |
9 | 8 | 4 | 7 | — | — | 10 | 70 | 27 | 17 | 56 | 5 | 5 | 28 | 13 | 19 | 54 | 57 | 44 | 9 | 12 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | N 6 | — | — | — | NW 16 | NNW 17 | NNW 16 | N 7 | NNW 16 | NNW 15 | NNW 15 | NNW 8 | NNW 15 | NNW 7 | ENE 3 | — | NW 15 | NW 14 |
— | — | — | 1 | — | — | — | 10 | 28 | 25 | 4 | 24 | 22 | 22 | 11 | 23 | 4 | 1 | — | 8 | 8 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | NW 11 | NW 12 | — | — | NW 11 | — | NNW 16 | NNW 11 | — | NW 4 | — | — | — |
— | — | — | — | — | — | — | — | 18 | 6 | — | — | 5 | — | 25 | 11 | — | 1 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | WSW 2 | WNW 4 | NNW 5 | NNW 5 | N 7 | — | WSW 2 | — | — | — | — | NW 6 | — | WSW 3 | NE 4 | NNE 4 | — | — | NW 6 |
— | — | 1 | 2 | 40 | 43 | 193 | — | 1 | — | — | — | — | 109 | — | 3 | 15 | 2 | — | — | 58 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 83 | 133 | 88 | 88 | 14 | 88 | 7 | 115 | 14 | 14 | 83 | 83 | 83 | 115 | 14 | 170 | 133 | 83 | 14 | 83 | 14 |
Best forecast wave conditions in Nelson - Tasman Bay | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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










