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Radionuclides which present in different beach sands are sources of external exposure that contribute to the total radiation exposure of human. In this work, superficial samples of beach sand were collected from the Red Sea coastline (Ras Gharib, Hurghada, Safaga, Qusier and Marsa Alam areas) and at 20 km on Qena-Safaga road. The distribution of natural radionuclides in sand beach samples was studied by gamma spectrometry. The activity concentrations of primordial and artificial radionuclides in samples that are collected from the coastal environment of the Red Sea were 19.2 ± 3 Bq kg⁻¹ for ²¹⁰Pb, 21.1 ± 1 Bq kg⁻¹ for ²²⁶Ra, 22.7 ± 2 Bq kg⁻¹ for ²³⁸U, 1.0 ± 0.1 Bq kg⁻¹ for ²³⁵U, 11.6 ± 1 Bq kg⁻¹ for ²²⁸Ra, 13.0 ± 1 Bq kg⁻¹ for ²²⁸Th, 12.4 ± 1 Bq kg⁻¹ for ²³²Th, 930 ± 32 Bq kg⁻¹ for ⁴⁰K and 1.2 ± 0.3 Bq kg⁻¹ for ¹³⁷Cs. The mean external gamma-dose rate was 62.5 ± 3.2 nSv h⁻¹, 54.4 ± 2.8 …