The most detailed information about the water temperature in Sarnia in Large Lakes (Ontario, Canada). Forecast of changes in water temperature for the next 10 days. Statistics by months for recent years. Information about the neighboring resorts. Weather forecast in Sarnia for a week.
Water temperature in Sarnia right now
data updated 20 minutes ago71°F
yesterday: 70°F
a week ago: 70°F
Trend: slow drop
Today water temperature in Sarnia is 71.1°F. This water is cool and invigorating, but for many people it is already comfortable enough for swimming. In general, this temperature is considered normal, but if your circulation is impaired, the water may still feel cool. In any case, the general weather is also important. So, the air temperature at the same time will reach 62°F.
Analysis and forecast
The water temperature today is slightly lower than the average on this day in recent years. Its value has rise both over the past 20 days and over the past week. Exactly a year ago, on this day, the water temperature in this location was 69°F. Water temperature range in Sarnia in August is from 69 to 77 degrees.
According to our forecast, in the coming days, the water temperature value in Sarnia will slightly drop and in 10 days it will be 70°F.
Table of water temperature values in Sarnia
| Day | Fact* | Average** | Forecast*** |
| Jul 29 | 22.4°C | 22.5°C | |
| Jul 30 | 22.9°C | 23.0°C | |
| Jul 31 | 23.2°C | 22.8°C | |
| Aug 1 | 22.0°C | 21.8°C | |
| Aug 2 | 22.2°C | 22.3°C | |
| Aug 3 | 21.8°C | 22.5°C | |
| Aug 4 | 21.6°C | 22.5°C | |
| Aug 5 | 21.7°C | 23.3°C | |
| Aug 6 | 22.3°C | 20.8°C | |
| Aug 7 | 22.3°C | 20.8°C | |
| Aug 8 | 21.8°C | 20.3°C | |
| Aug 9 | 22.0°C | 20.5°C | |
| Aug 10 | 22.8°C | 21.2°C | |
| Aug 11 | 22.0°C | 20.5°C | |
| Aug 12 | 22.3°C | 20.8°C |
** Average - Average water temperature on this day in past years
*** Forecast - Our forecast for the water temperature
Actual nearshore temperatures may vary by several degrees from the indicated values. This is noticeable after heavy rain or after prolonged periods of strong winds. Some downstream winds cause cold, deep waters to replace surface waters that have been warmed by the sun.
To develop a forecast, we use our own mathematical model, which takes into account the current change in water temperature, historical data and the main weather trends, wind strength and direction, air temperature in each specific region. We also take into account data for other resorts in Canada.
Annual graph of average water temperature change in Sarnia
Water temperature in Sarnia by month
Sarnia located in the northern hemisphere, at latitude 42 degrees. The comfortable water temperature for swimming is set here in July, usually at the beginning of the month. During a year in Sarnia there are 67 days of swimming. In general, the swimming season ends in September. Average annual water temperature on the coast in Sarnia is 50°F, by the seasons: in winter 36°F, in spring 38°F, in summer 67°F, in autumn 58°F. Minimum water temperature (32°F) in Sarnia it happens in February, maximum (74°F) in July.
You can find out detailed data on how the water temperature in Sarnia changes in each specific month:
Sarnia: general information and map
Neighboring cities and resorts
| City | Water* | Distance** |
| Port Huron | 70°C | 2km |
| Fort Gratiot Township | 72°C | 9km |
| Saint Clair | 71°C | 19km |
| Marine City | 70°C | 30km |
| Lexington | 70°C | 34km |
| Algonac | 71°C | 41km |
| Pearl Beach | 71°C | 42km |
| New Baltimore | 71°C | 43km |
| Mount Clemens | 72°C | 57km |
| Lake St Clair | 72°C | 65km |
| Saint Clair Shores | 71°C | 67km |
| Detroit | 72°C | 89km |
** Straight line distance in kilometers
The warmest water today in Canada recorded in Thorold, its value is 74°F. Lowest - in Gjoa Haven, there water temperature now 30°F. Average water temperature in the country today - 58°F.
Water temperature data in Sarnia and neighboring towns and resorts collected from various sources, using buoys, using satellite maps of sea, river and lake surfaces of the NOAA agency.
We use data from various local authorities in each specific location of the world to more accurately reflect temperature values.
The nearest airport is located in a 8 kilometers. This is Chris Hadfield (YZR) airport. We have no information as to whether it is valid and what flights it receives or sends.
Sarnia: weather forecast
The weather forecast is shown in local time in Sarnia
6km/hhumidity: 80%, clouds: 0%
6km/hhumidity: 76%, clouds: 0%
7km/hhumidity: 61%, clouds: 0%
10km/hhumidity: 49%, clouds: 0%
11km/hhumidity: 44%, clouds: 1%
12km/hhumidity: 66%, clouds: 18%
12km/hhumidity: 70%, clouds: 100%
12km/hhumidity: 80%, clouds: 63%
11km/hhumidity: 87%, clouds: 43%
10km/hhumidity: 84%, clouds: 57%
19km/hhumidity: 68%, clouds: 86%
23km/hhumidity: 52%, clouds: 93%
25km/hhumidity: 53%, clouds: 100%
20km/hhumidity: 74%, clouds: 90%
14km/hhumidity: 93%, clouds: 100%
14km/hhumidity: 92%, clouds: 99%
14km/hhumidity: 93%, clouds: 67%
11km/hhumidity: 93%, clouds: 49%
16km/hhumidity: 72%, clouds: 43%
14km/hhumidity: 56%, clouds: 32%
15km/hhumidity: 54%, clouds: 22%
8km/hhumidity: 75%, clouds: 28%
4km/hhumidity: 82%, clouds: 89%
8km/hhumidity: 90%, clouds: 80%
10km/hhumidity: 92%, clouds: 55%
9km/hhumidity: 90%, clouds: 71%
18km/hhumidity: 68%, clouds: 80%
16km/hhumidity: 62%, clouds: 90%
16km/hhumidity: 86%, clouds: 100%
17km/hhumidity: 94%, clouds: 100%
20km/hhumidity: 95%, clouds: 100%
20km/hhumidity: 97%, clouds: 99%
24km/hhumidity: 97%, clouds: 58%
26km/hhumidity: 94%, clouds: 38%
29km/hhumidity: 83%, clouds: 100%
38km/hhumidity: 78%, clouds: 100%
34km/hhumidity: 74%, clouds: 93%
30km/hhumidity: 82%, clouds: 58%
19km/hhumidity: 94%, clouds: 59%
