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 18.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| SEP 14 | 19.2°C | 19.6°C | |
| SEP 15 | 18.7°C | 19.6°C | |
| SEP 16 | 18.8°C | 19.6°C | |
| SEP 17 | 18.1°C | 19.6°C | |
| SEP 18 | 18.3°C | 19.6°C | |
| SEP 19 | 18.6°C | 19.6°C | |
| SEP 20 | 18.5°C | 19.6°C | |
| SEP 21 | 18.4°C | 19.6°C | |
| SEP 22 | 19.6°C | 18.5°C | |
| SEP 23 | 19.6°C | 18.5°C | |
| SEP 24 | 19.6°C | 18.6°C | |
| SEP 25 | 19.6°C | 18.6°C | |
| SEP 26 | 19.6°C | 18.7°C | |
| SEP 27 | 19.6°C | 18.8°C | |
| SEP 28 | 19.6°C | 18.8°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 | 20°C | 24°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
September 21
September 22
September 23
September 24
September 25
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.