The temperature in an estuary biome varies with the season and estuary. For example, the Aln estuary in England has an average temperature range of 13 to 17 degrees Celsius or 55 to 63 degrees Fahrenheit. The temperature of an estuary often correlates with health of the biome.
Dissolved oxygen is essential for life in estuaries. The higher the temperature of an estuary, the less dissolved oxygen is available in the ecosystem. For example, a rise in temperature of approximately 14 degrees Celsius can reduce the amount of dissolved oxygen by a little less than half mg per liter. Different plants and animals are able to adapt to the conditions of the estuary based on their innate biological mechanisms.