Greenwich wave buoy daily averages for Sep 2025 last observation shown Data available: to Monthly averages for
Average Wave Height
3 ft
0.7 — 8.2 ft
Average Wave period
7 secs
5 — 12 secs
Average Water temperature
18 °C
16.7 — 18.5 °C
Average Wind
SW, 20 mph
1 — 40 mph
Chart showing grouped wave observations for Greenwich. Use the table on this page for a text version of the same measurements.
About Greenwich wave buoy
Greenwich (WMO 62305) is an offshore station in the southern North Sea/Thames approaches (50.4170°N, 0.0000°E). It is sited to monitor waves and weather affecting busy shipping lanes and coastal flood/sea-state forecasting for south‑east England. It reports wave height/period/direction and meteorological variables such as wind and pressure.
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 4 | 7 | SW | 24 | 18.1 | |
| 4 | 6 | SSW | 24 | 18.0 | |
| 7 | 7 | SSW | 33 | 18.0 | |
| 6 | 7 | SW | 28 | 17.9 | |
| 3 | 7 | WSW | 13 | 18.0 | |
| 1 | 7 | ESE | 16 | 18.1 | |
| 2 | 6 | SSE | 18 | 18.1 | |
| 2 | 7 | WSW | 15 | 18.0 | |
| 1 | 7 | S | 11 | 18.0 | |
| 3 | 6 | SSW | 25 | 17.8 | |
| 6 | 7 | WSW | 30 | 17.7 | |
| 6 | 7 | WSW | 29 | 17.6 | |
| 6 | 7 | WSW | 27 | 17.5 | |
| 3 | 7 | SW | 21 | 17.6 | |
| - | - | - | - | - | |
| 6 | 7 | W | 27 | 17.4 | |
| 4 | 7 | SW | 25 | 17.5 | |
| 4 | 7 | SW | 19 | 17.7 | |
| 2 | 8 | S | 11 | 17.8 | |
| 3 | 7 | SSW | 19 | 17.6 | |
| 3 | 7 | NNE | 20 | 17.4 | |
| 3 | 6 | NNE | 27 | 17.1 | |
| 2 | 5 | NNE | 25 | 17.0 | |
| 3 | 6 | NNE | 25 | 17.0 | |
| 3 | 6 | NNE | 23 | 16.9 | |
| 2 | 7 | E | 14 | 16.8 | |
| 1 | 8 | SSE | 12 | 16.9 | |
| 2 | 7 | SSW | 9 | 17.0 | |
| 1 | 9 | NNE | 8 | 17.0 | |
| 1 | 10 | W | 4 | 17.2 |