Monewden Meadows is a 3.7-hectare (9.1-acre) biological Site of Special Scientific Interest south-west of Monewden in Suffolk. It is a Nature Conservation Review site, Grade I, and it is managed by the Suffolk Wildlife Trust under the name Martins' Meadows.

The site consists of three unimproved fields described as a "species-rich lowland meadow" classified as type MG5. It is described as the best remaining area of clay or neutral lowland meadow remaining in Suffolk. Floral species include snake's-head fritillary (Fritillaria meleagris), early purple orchid (Orchis mascula), green-winged orchid (Anacamptis morio), pyramidal orchid (Anacamptis pyramidalis), common twayblade (Listera ovata), meadow saffron (Colchicum autumnale), adder's-tongue fern (Ophioglossum vulgatum), pepper saxifrage (Silaum silaus) and rim lichen (Lecanora pulicaris). Notable fauna includes great-crested newt (Triturus cristatus) and barn owl (Tyto alba).

There is access from the road between Monewden and Clopton.

• List of Sites of Special Scientific Interest in Suffolk
• Suffolk Wildlife Trust

52°10′01″N 1°15′22″E / 52.167°N 1.256°E / 52.167; 1.256