Siltcoos Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Siltcoos Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Siltcoos Lake today is 23.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 4 | 23.8°C | 20.2°C | |
| AUG 5 | 24.0°C | 20.2°C | |
| AUG 6 | 23.7°C | 20.2°C | |
| AUG 7 | 23.7°C | 20.2°C | |
| AUG 8 | 24.0°C | 20.2°C | |
| AUG 9 | 24.3°C | 20.2°C | |
| AUG 10 | 24.1°C | 20.2°C | |
| AUG 11 | 23.9°C | 20.2°C | |
| AUG 12 | 20.2°C | 23.7°C | |
| AUG 13 | 20.2°C | 23.5°C | |
| AUG 14 | 20.2°C | 23.3°C | |
| AUG 15 | 20.2°C | 23.2°C | |
| AUG 16 | 20.2°C | 23.0°C | |
| AUG 17 | 20.2°C | 22.8°C | |
| AUG 18 | 20.2°C | 22.6°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 4°C | 8°C | 11°C |
| February | 5°C | 8°C | 11°C |
| March | 2°C | 7°C | 13°C |
| April | 8°C | 13°C | 17°C |
| May | 9°C | 13°C | 18°C |
| June | 14°C | 18°C | 21°C |
| July | 18°C | 21°C | 24°C |
| August | 16°C | 20°C | 25°C |
| September | 16°C | 18°C | 21°C |
| October | 12°C | 16°C | 20°C |
| November | 8°C | 12°C | 16°C |
| December | 7°C | 11°C | 14°C |
Siltcoos Lake: Water Temperature by Location
Siltcoos Lake: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
Siltcoos Lake on the Oregon Coast experiences a wide range of surface water temperatures through the year. In spring (roughly March–May) surface readings are commonly around 45–60°F (7–15°C). During summer (June–August) the lake warms the most, typically reaching about 60–72°F (15–22°C), with shallow bays sometimes climbing into the low 70s (21–23°C) on warm, calm days. In the fall (September–November) temperatures usually fall back into the 50–60°F range (10–15°C), and in winter (December–February) the lake is cool, often near 40–48°F (4–9°C). These figures are approximate; local conditions such as weather, depth, and wind can produce variation between shallow and deeper areas.
Swimming at Siltcoos Lake is allowed and the lake is a popular spot for recreational paddling, boating, and swimming when conditions are favorable. Because the water can remain brisk outside the warmest weeks, comfort and safety considerations matter: cold water increases the risk of cold shock and rapid loss of body heat, so many swimmers choose shallow, sun-warmed areas or use wetsuits in cooler months. There are public access points but typically no lifeguards, so swimmers should heed posted advisories, monitor water quality notices, and take standard precautions such as wearing a personal flotation device for weaker swimmers.