
Surf Forecasts:
Ruby Bay surf forecast from 6 Sep 2026:
- Most powerful swell: Monday 7 Sep, 9AM (local time) - 3.5ft (1.0m), 5s period, ESE swell with 53 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 1.0m 5s and forecast to arrive on Monday (Sep 07) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Sep 07) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 9AM (Mon 7th Sep) | 3.5ft (1.0m) 5s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
G'day, Rusty here. Well, I've gotta be straight with ya – if you're looking for a surf this week, you're gonna be staring at a flat lake for a while. Ruby Bay is the only spot on the cards, and it's a tough one. This place is a sheltered little point, a beginner spot that rarely breaks, and the outlook is a long, drawn-out stretch of nothing. We're talking over a week of poor surf conditions, day after day, starting from today, the 7th of September. The water temp here is about average for this time of year, nothing to write home about.
There's a tiny window of tiny, crummy waves around the 7th and 8th, but that's it. Monday morning the 7th, there's a weak 3 ft swell from the ESE, but with a short period of only 5 seconds, it's all mush, and there's a bit of rain and cross-off wind to deal with. The energy is basically nothing (81). Monday afternoon, it drops to a glassy 1.0 ft from the north, with a period of 9 seconds – looks pretty but there's no push behind it, just 14 in the energy department. Tuesday is more of the same, tiny, weak waves. After that, it's a solid block of zeros – nothing, nada, for days. The wind is often offshore or glassy, but there's simply no swell to work with.
Now, there is a bit of a tease right at the end of the run. Around Saturday the 18th and into Sunday the 20th, we start to see some size appear. Saturday afternoon the 18th, the energy jumps to 119 with a 4 ft NW swell, but it's a short period of 6 seconds, so it'll be bumpy and weak. Sunday the 19th is similar, with a 4 ft N swell. But the real blip is on Sunday the 20th. Morning and afternoon both show a 5 ft N swell with a much better 10-second period, and the energy jumps to a solid 386. The wind is looking clean, cross-off in the morning and glassy in the afternoon. But don't get too excited – even then, the conditions are described as "very ordinary" and it only scrapes a score of 1 out of 10. It's a tiny, inconsistent point break, so a 5 ft swell might actually be the best it gets for a fleeting moment. But with a period of 10 seconds and a northerly swell coming from the opposite direction of the optimum (N), it's not going to wrap in properly. It'll likely be a messy, close-out shorebreak.
After that tease, it fades back to tiny, poor surf on the 21st and 22nd. Honestly, the whole 16-day window is a write-off. It’s a real bummer for a spot that so rarely offers anything. If you're desperate, keep an eye on that Sunday the 20th, but I wouldn't plan a trip around it. The forecast can change, but right now, it's looking like a long, flat spell.
Rusty.
Short Range ForecastHeavy rain (total 39mm), heaviest during Sun night. Very mild (max 13°C on Wed afternoon, min 5°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Thu morning. Very mild (max 13°C on Fri morning, min 3°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
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) | N 7 | ESE 5 | N 9 | N 10 | N 9 | N 8 | N 8 | N 8 | N 8 | N 18 | N 7 | N 6 | N 6 | N 6 | NW 18 | NW 17 | NW 16 | NW 15 | NW 16 |
Wave Graph | |||||||||||||||||||
181 | 53 | 14 | 30 | 23 | 23 | 12 | 5 | 11 | 6 | 1 | 1 | 1 | 3 | 0 | 0 | 0 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | glassy | glassy | glassy | on | glassy | glassy | on | off | glassy | off | cross-off | off | off | off | off | off | off |
High Tide | 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 | 10:42AM4.16m | 10:57PM4.28m | |||||||
Low Tide | 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 | 4:14AM0.47m | 4:34PM0.57m | |||||||
— | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | |
— | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:13 | — | |
mm | 25 | 13 | 1 | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — |
Temp °C | 12 | 7 | 8 | 7 | 11 | 10 | 9 | 12 | 13 | 8 | 11 | 11 | 7 | 13 | 11 | 7 | 13 | 13 | 8 |
Feels °C | 12 | 4 | 6 | 5 | 9 | 7 | 8 | 10 | 11 | 5 | 9 | 7 | 4 | 8 | 8 | 3 | 9 | 8 | 5 |
Swell 1 Height (m) Direction Period (s) | N 7 | N 8 | E 5 | N 10 | N 9 | N 8 | N 8 | N 8 | N 20 | NNW 7 | NNW 4 | NNW 5 | NNW 4 | NW 19 | NW 18 | NW 17 | NW 16 | NW 15 | NNW 5 |
181 | 28 | 12 | 30 | 23 | 23 | 12 | 5 | 8 | 9 | 7 | 7 | 2 | 92 | 82 | 76 | 63 | 59 | 4 | |
Swell 2 Height (m) Direction Period (s) | NNW 16 | ENE 8 | SE 4 | SE 3 | NE 4 | NW 13 | — | — | N 14 | N 18 | N 7 | NW 16 | NNW 19 | — | NNW 6 | NNW 4 | NNW 6 | — | NW 16 |
25 | 6 | 7 | 2 | 1 | 7 | — | — | 4 | 6 | 1 | 10 | 37 | — | 3 | 2 | 4 | — | 38 | |
Swell 3 Height (m) Direction Period (s) | — | NW 16 | N 9 | ENE 4 | N 14 | — | — | — | — | N 12 | NW 17 | N 6 | N 6 | N 6 | — | NW 6 | — | — | — |
— | 10 | 14 | 2 | 4 | — | — | — | — | 3 | 12 | 1 | 1 | 3 | — | 2 | — | — | — | |
Wind waves Height (m) Direction Period (s) | NW 8 | ESE 5 | SE 4 | SE 3 | — | NE 4 | — | — | N 8 | WSW 2 | — | — | SSW 3 | — | NW 6 | — | SW 3 | — | — |
239 | 53 | 31 | 3 | — | 1 | — | — | 11 | 1 | — | — | 2 | — | 8 | — | 2 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 7 | 83 | 83 | 38 | 38 | 38 | 83 | 83 | 83 | 115 | 115 | 207 | 14 | 83 | 83 | 83 | 83 | 83 | 125 |
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










