NW Lake Ontario Ajax (45159) — Live Marine Conditions & Buoy Data
NOAA station 45159, NW Lake Ontario Ajax, reports real-time marine conditions from 43.770°N, 78.980°W in Lake Ontario. Readings refresh roughly every 10 minutes, and Big Buoy adds a solunar table and a multi-day weather outlook for the area.
Lake Ontario Marine Conditions — NW Lake Ontario Ajax is one of several stations in Lake Ontario. See live buoy data and solunar for the whole area.
Current conditions at NW Lake Ontario Ajax
As of October 19, 2026 at 19:00 UTC, NW Lake Ontario Ajax (45159) is reporting water temperature 56°F, air temperature 59°F, wave height 1.3 ft at a 3-second dominant period, wind from the SW at 11 mph gusting 13 mph, and barometric pressure 30.35 inHg.
- Water temperature
- 56°F
- Air temperature
- 59°F
- Wave height
- 1.3 ft @ 3 s
- Wind
- SW 11 mph (gust 13)
- Barometric pressure
- 30.35 inHg
Observed October 19, 2026 at 19:00 UTC from NOAA NDBC station 45159. Readings update about every 10 minutes.
What NOAA buoy 45159 measures
As a NOAA meteorological station, 45159 reports wind speed, gusts and direction, barometric pressure, air and water temperature, and — where wave sensors are fitted — significant wave height, swell period, and wave direction.
What to watch in Lake Ontario
Lake Ontario is deep and steep-sided, so it stratifies strongly in summer and holds cold water below the thermocline while wind-driven upwelling swings surface temperature along the shore. Seas build quickly on a sustained westerly or northeasterly blow — read wind and water temperature together before you go.
Frequently asked questions
- What is the water temperature at NW Lake Ontario Ajax?
- Sea surface temperature at NW Lake Ontario Ajax was 56°F. Measured October 19, 2026 at 19:00 UTC by NOAA station 45159 (NW Lake Ontario Ajax). NDBC measures this near the surface, at a depth that varies by station.
- What is the air temperature at NW Lake Ontario Ajax?
- Air temperature at NW Lake Ontario Ajax was 59°F. Measured October 19, 2026 at 19:00 UTC by NOAA station 45159 (NW Lake Ontario Ajax).
- What is the wind doing at NW Lake Ontario Ajax?
- Wind at NW Lake Ontario Ajax was from the SW at 11 mph, with peak gusts to 13 mph. Measured October 19, 2026 at 19:00 UTC by NOAA station 45159 (NW Lake Ontario Ajax). NDBC records wind at the station’s anemometer height, which is not the 10 m height used in marine forecasts.
- How big are the waves at NW Lake Ontario Ajax?
- Significant wave height at NW Lake Ontario Ajax was 1.3 ft, with a 3-second dominant period. Measured October 19, 2026 at 19:00 UTC by NOAA station 45159 (NW Lake Ontario Ajax). Significant wave height is the average of the highest one-third of waves — individual waves can be larger.
- What is the barometric pressure at NW Lake Ontario Ajax?
- Sea-level pressure at NW Lake Ontario Ajax was 30.35 inHg (1027.7 hPa). Measured October 19, 2026 at 19:00 UTC by NOAA station 45159 (NW Lake Ontario Ajax). NDBC reports pressure reduced to sea level rather than the raw reading at the station.
- Where is NOAA buoy 45159 located?
- NW Lake Ontario Ajax (45159) reports from 43.770°N, 78.980°W in Lake Ontario.
- How often is NOAA buoy 45159 updated?
- Station 45159 typically reports new observations about every 10 minutes. Big Buoy refreshes continuously so you always see the latest readings, alongside a solunar table for the area.
- What does NOAA buoy 45159 measure?
- Big Buoy shows wind, barometric pressure, air and water temperature, and wave height and period where available for NW Lake Ontario Ajax, plus solunar peak windows and a multi-day weather outlook.
- Is Big Buoy free to use?
- Yes. Live data for NW Lake Ontario Ajax and every other NOAA buoy is free with no account required. Big Buoy Pro adds the Wind Tab, the Depth Chart, satellite overlays (sea surface temp, chlorophyll, currents), 16-day forecasts, and forecast model switching.